fidl_fuchsia_ui_scenic/

fidl_fuchsia_ui_scenic.rs

// WARNING: This file is machine generated by fidlgen.

#![warn(clippy::all)]
#![allow(unused_parens, unused_mut, unused_imports, nonstandard_style)]

use bitflags::bitflags;
use fidl::client::QueryResponseFut;
use fidl::encoding::{MessageBufFor, ProxyChannelBox, ResourceDialect};
use fidl::endpoints::{ControlHandle as _, Responder as _};
pub use fidl_fuchsia_ui_scenic__common::*;
use futures::future::{self, MaybeDone, TryFutureExt};
use zx_status;

#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ScenicCreateSession2Request {
    pub session: fidl::endpoints::ServerEnd<SessionMarker>,
    pub listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
    pub view_focuser: Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for ScenicCreateSession2Request
{
}

#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ScenicCreateSessionRequest {
    pub session: fidl::endpoints::ServerEnd<SessionMarker>,
    pub listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for ScenicCreateSessionRequest
{
}

#[derive(Debug, PartialEq)]
pub struct ScenicCreateSessionTRequest {
    pub endpoints: SessionEndpoints,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for ScenicCreateSessionTRequest
{
}

#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ScenicGetDisplayOwnershipEventResponse {
    pub ownership_event: fidl::Event,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for ScenicGetDisplayOwnershipEventResponse
{
}

#[derive(Debug, PartialEq)]
pub struct ScenicTakeScreenshotResponse {
    pub img_data: ScreenshotData,
    pub success: bool,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for ScenicTakeScreenshotResponse
{
}

/// Scenic.TakeScreenshot() returns a raw BGRA formatted image in
/// sRGB color space and with a non-linear transfer function in this
/// struct.
#[derive(Debug, PartialEq)]
pub struct ScreenshotData {
    pub info: fidl_fuchsia_images::ImageInfo,
    pub data: fidl_fuchsia_mem::Buffer,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect> for ScreenshotData {}

#[derive(Debug, PartialEq)]
pub struct SessionEnqueueRequest {
    pub cmds: Vec<Command>,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect> for SessionEnqueueRequest {}

#[derive(Debug, PartialEq)]
pub struct SessionListenerOnScenicEventRequest {
    pub events: Vec<Event>,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for SessionListenerOnScenicEventRequest
{
}

#[derive(Debug, PartialEq)]
pub struct SessionPresent2Request {
    pub args: Present2Args,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect> for SessionPresent2Request {}

#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct SessionPresentRequest {
    pub presentation_time: u64,
    pub acquire_fences: Vec<fidl::Event>,
    pub release_fences: Vec<fidl::Event>,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect> for SessionPresentRequest {}

#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct SessionRegisterBufferCollectionRequest {
    pub buffer_id: u32,
    pub token: fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for SessionRegisterBufferCollectionRequest
{
}

/// Arguments passed into Present2(). Note that every argument is mandatory.
#[derive(Debug, Default, PartialEq)]
pub struct Present2Args {
    /// `requested_presentation_time` specifies the time on or after which the
    /// client would like the enqueued operations to take visible effect
    /// (light up pixels on the screen), expressed in nanoseconds in the
    /// `CLOCK_MONOTONIC` timebase.
    ///
    /// Using a `requested_presentation_time` in the present or past (such as 0)
    /// schedules enqueued operations to take visible effect as soon as
    /// possible, during the next frame to be prepared. Requested presentation
    /// times must be monotonically increasing.
    ///
    /// Using a `requested_presentation_time` in the future schedules the enqueued
    /// operations to take visible effect as closely as possible to or after
    /// the stated time, but no earlier.
    ///
    /// Each rendered frame has a target presentation time. This is when Scenic
    /// aims to have the frame presented to the user. Before rendering a frame,
    /// the scene manager applies all enqueued operations associated with all
    /// prior calls to Present2 whose `requested_presentation_time` is on or
    /// before the frame's target presentation time.
    pub requested_presentation_time: Option<i64>,
    /// Scenic will wait until all of a session's `acquire_fences` are ready
    /// before it will execute the presented commands.
    pub acquire_fences: Option<Vec<fidl::Event>>,
    /// `release_fences` is the list of events that will be signalled by Scenic when
    /// the following Present2 call's `acquire_fences` has been signalled, and
    /// the updated session state has been fully committed: future frames will be
    /// rendered using this state, and all frames generated using previous session
    /// states have been fully-rendered and presented to the display.
    pub release_fences: Option<Vec<fidl::Event>>,
    /// `requested_prediction_span` is the amount of time into the future Scenic
    /// will provide predictions for. A span of 0 is guaranteed to provide at
    /// least one future time.
    pub requested_prediction_span: Option<i64>,
    #[doc(hidden)]
    pub __source_breaking: fidl::marker::SourceBreaking,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect> for Present2Args {}

/// The protocol endpoints used in creating a Scenic Session.
#[derive(Debug, Default, PartialEq)]
pub struct SessionEndpoints {
    /// Enqueue commands and present content.
    /// Required.
    pub session: Option<fidl::endpoints::ServerEnd<SessionMarker>>,
    /// Receive session-related events.
    /// Optional.
    pub session_listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
    /// Change view focus, within the session view's subtree.
    /// Optional.
    pub view_focuser: Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>,
    /// Learn when this session view receives or loses view focus.
    /// Optional.
    pub view_ref_focused:
        Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::ViewRefFocusedMarker>>,
    /// Ask for touch events and negotiate for gesture ownership.
    /// Optional.
    pub touch_source:
        Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::TouchSourceMarker>>,
    /// Ask for mouse events.
    /// Optional.
    pub mouse_source:
        Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::MouseSourceMarker>>,
    #[doc(hidden)]
    pub __source_breaking: fidl::marker::SourceBreaking,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect> for SessionEndpoints {}

#[derive(Debug, PartialEq)]
pub enum Command {
    Gfx(fidl_fuchsia_ui_gfx::Command),
    Views(fidl_fuchsia_ui_views::Command),
    Input(fidl_fuchsia_ui_input::Command),
}

impl Command {
    #[inline]
    pub fn ordinal(&self) -> u64 {
        match *self {
            Self::Gfx(_) => 1,
            Self::Views(_) => 3,
            Self::Input(_) => 4,
        }
    }
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect> for Command {}

#[derive(Debug, PartialEq)]
pub enum Event {
    Gfx(fidl_fuchsia_ui_gfx::Event),
    Input(fidl_fuchsia_ui_input::InputEvent),
    Unhandled(Command),
}

impl Event {
    #[inline]
    pub fn ordinal(&self) -> u64 {
        match *self {
            Self::Gfx(_) => 1,
            Self::Input(_) => 2,
            Self::Unhandled(_) => 3,
        }
    }
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect> for Event {}

#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct ScenicMarker;

impl fidl::endpoints::ProtocolMarker for ScenicMarker {
    type Proxy = ScenicProxy;
    type RequestStream = ScenicRequestStream;
    #[cfg(target_os = "fuchsia")]
    type SynchronousProxy = ScenicSynchronousProxy;

    const DEBUG_NAME: &'static str = "fuchsia.ui.scenic.Scenic";
}
impl fidl::endpoints::DiscoverableProtocolMarker for ScenicMarker {}

pub trait ScenicProxyInterface: Send + Sync {
    fn r#create_session(
        &self,
        session: fidl::endpoints::ServerEnd<SessionMarker>,
        listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
    ) -> Result<(), fidl::Error>;
    fn r#create_session2(
        &self,
        session: fidl::endpoints::ServerEnd<SessionMarker>,
        listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
        view_focuser: Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>,
    ) -> Result<(), fidl::Error>;
    type CreateSessionTResponseFut: std::future::Future<Output = Result<(), fidl::Error>> + Send;
    fn r#create_session_t(&self, endpoints: SessionEndpoints) -> Self::CreateSessionTResponseFut;
    type GetDisplayInfoResponseFut: std::future::Future<Output = Result<fidl_fuchsia_ui_gfx::DisplayInfo, fidl::Error>>
        + Send;
    fn r#get_display_info(&self) -> Self::GetDisplayInfoResponseFut;
    type GetDisplayOwnershipEventResponseFut: std::future::Future<Output = Result<fidl::Event, fidl::Error>>
        + Send;
    fn r#get_display_ownership_event(&self) -> Self::GetDisplayOwnershipEventResponseFut;
    type TakeScreenshotResponseFut: std::future::Future<Output = Result<(ScreenshotData, bool), fidl::Error>>
        + Send;
    fn r#take_screenshot(&self) -> Self::TakeScreenshotResponseFut;
    type UsesFlatlandResponseFut: std::future::Future<Output = Result<bool, fidl::Error>> + Send;
    fn r#uses_flatland(&self) -> Self::UsesFlatlandResponseFut;
}
#[derive(Debug)]
#[cfg(target_os = "fuchsia")]
pub struct ScenicSynchronousProxy {
    client: fidl::client::sync::Client,
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::SynchronousProxy for ScenicSynchronousProxy {
    type Proxy = ScenicProxy;
    type Protocol = ScenicMarker;

    fn from_channel(inner: fidl::Channel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    fn as_channel(&self) -> &fidl::Channel {
        self.client.as_channel()
    }
}

#[cfg(target_os = "fuchsia")]
impl ScenicSynchronousProxy {
    pub fn new(channel: fidl::Channel) -> Self {
        Self { client: fidl::client::sync::Client::new(channel) }
    }

    pub fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    /// Waits until an event arrives and returns it. It is safe for other
    /// threads to make concurrent requests while waiting for an event.
    pub fn wait_for_event(
        &self,
        deadline: zx::MonotonicInstant,
    ) -> Result<ScenicEvent, fidl::Error> {
        ScenicEvent::decode(self.client.wait_for_event::<ScenicMarker>(deadline)?)
    }

    /// Create a new Session, which is the primary way to interact with Scenic.
    pub fn r#create_session(
        &self,
        mut session: fidl::endpoints::ServerEnd<SessionMarker>,
        mut listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
    ) -> Result<(), fidl::Error> {
        self.client.send::<ScenicCreateSessionRequest>(
            (session, listener),
            0x2af781f341771a50,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    /// Create a new Session, which is the primary way to interact with Scenic.
    ///
    /// In this variant, the caller may register a request for focus management.
    /// The `view_focuser`'s client is coupled to the requested `session`, and
    /// this coupling acts as a security boundary: the ViewRef used as the basis
    /// for authority by `view_focuser` must come from `session`.
    pub fn r#create_session2(
        &self,
        mut session: fidl::endpoints::ServerEnd<SessionMarker>,
        mut listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
        mut view_focuser: Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>,
    ) -> Result<(), fidl::Error> {
        self.client.send::<ScenicCreateSession2Request>(
            (session, listener, view_focuser),
            0x11fa60f776121fa5,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    /// Create a new Session, which is the primary way to interact with Scenic.
    ///
    /// In this variant, the caller may submit a combination of protocols
    /// that make sense for it. The Session protocol is the only required
    /// protocol. The SessionEndpoints table may be extended with more protocol
    /// fields, but these extensions should retain ABI and API compatibility
    /// with existing (pre-compiled) clients.
    ///
    /// The response acknowledges the request to create a Session, but actual
    /// creation may happen later.
    pub fn r#create_session_t(
        &self,
        mut endpoints: SessionEndpoints,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<(), fidl::Error> {
        let _response = self
            .client
            .send_query::<ScenicCreateSessionTRequest, fidl::encoding::EmptyPayload, ScenicMarker>(
                (&mut endpoints,),
                0x369061a897552d4f,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok(_response)
    }

    /// Get information about the Scenic's primary display.
    pub fn r#get_display_info(
        &self,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<fidl_fuchsia_ui_gfx::DisplayInfo, fidl::Error> {
        let _response = self
            .client
            .send_query::<fidl::encoding::EmptyPayload, ScenicGetDisplayInfoResponse, ScenicMarker>(
                (),
                0x3e4cdecbf7cc1797,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok(_response.info)
    }

    /// Gets an event signaled with displayOwnedSignal or displayNotOwnedSignal
    /// when display ownership changes.
    pub fn r#get_display_ownership_event(
        &self,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<fidl::Event, fidl::Error> {
        let _response = self.client.send_query::<
            fidl::encoding::EmptyPayload,
            ScenicGetDisplayOwnershipEventResponse,
            ScenicMarker,
        >(
            (),
            0x54c114c7322b24d6,
            fidl::encoding::DynamicFlags::empty(),
            ___deadline,
        )?;
        Ok(_response.ownership_event)
    }

    /// Take a screenshot and return the data in `img_data`. `img_data` will
    /// not contain BGRA data if `success` is false.
    pub fn r#take_screenshot(
        &self,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<(ScreenshotData, bool), fidl::Error> {
        let _response = self
            .client
            .send_query::<fidl::encoding::EmptyPayload, ScenicTakeScreenshotResponse, ScenicMarker>(
                (),
                0x53f5e06463987df2,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok((_response.img_data, _response.success))
    }

    /// Returns whether the clients should use [`fuchsia.ui.composition/Flatland`] protocol to
    /// interact with Scenic instead.
    pub fn r#uses_flatland(&self, ___deadline: zx::MonotonicInstant) -> Result<bool, fidl::Error> {
        let _response = self
            .client
            .send_query::<fidl::encoding::EmptyPayload, ScenicUsesFlatlandResponse, ScenicMarker>(
                (),
                0x5f2e5e19463ae706,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok(_response.flatland_enabled)
    }
}

#[cfg(target_os = "fuchsia")]
impl From<ScenicSynchronousProxy> for zx::NullableHandle {
    fn from(value: ScenicSynchronousProxy) -> Self {
        value.into_channel().into()
    }
}

#[cfg(target_os = "fuchsia")]
impl From<fidl::Channel> for ScenicSynchronousProxy {
    fn from(value: fidl::Channel) -> Self {
        Self::new(value)
    }
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::FromClient for ScenicSynchronousProxy {
    type Protocol = ScenicMarker;

    fn from_client(value: fidl::endpoints::ClientEnd<ScenicMarker>) -> Self {
        Self::new(value.into_channel())
    }
}

#[derive(Debug, Clone)]
pub struct ScenicProxy {
    client: fidl::client::Client<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl fidl::endpoints::Proxy for ScenicProxy {
    type Protocol = ScenicMarker;

    fn from_channel(inner: ::fidl::AsyncChannel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> Result<::fidl::AsyncChannel, Self> {
        self.client.into_channel().map_err(|client| Self { client })
    }

    fn as_channel(&self) -> &::fidl::AsyncChannel {
        self.client.as_channel()
    }
}

impl ScenicProxy {
    /// Create a new Proxy for fuchsia.ui.scenic/Scenic.
    pub fn new(channel: ::fidl::AsyncChannel) -> Self {
        let protocol_name = <ScenicMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME;
        Self { client: fidl::client::Client::new(channel, protocol_name) }
    }

    /// Get a Stream of events from the remote end of the protocol.
    ///
    /// # Panics
    ///
    /// Panics if the event stream was already taken.
    pub fn take_event_stream(&self) -> ScenicEventStream {
        ScenicEventStream { event_receiver: self.client.take_event_receiver() }
    }

    /// Create a new Session, which is the primary way to interact with Scenic.
    pub fn r#create_session(
        &self,
        mut session: fidl::endpoints::ServerEnd<SessionMarker>,
        mut listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
    ) -> Result<(), fidl::Error> {
        ScenicProxyInterface::r#create_session(self, session, listener)
    }

    /// Create a new Session, which is the primary way to interact with Scenic.
    ///
    /// In this variant, the caller may register a request for focus management.
    /// The `view_focuser`'s client is coupled to the requested `session`, and
    /// this coupling acts as a security boundary: the ViewRef used as the basis
    /// for authority by `view_focuser` must come from `session`.
    pub fn r#create_session2(
        &self,
        mut session: fidl::endpoints::ServerEnd<SessionMarker>,
        mut listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
        mut view_focuser: Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>,
    ) -> Result<(), fidl::Error> {
        ScenicProxyInterface::r#create_session2(self, session, listener, view_focuser)
    }

    /// Create a new Session, which is the primary way to interact with Scenic.
    ///
    /// In this variant, the caller may submit a combination of protocols
    /// that make sense for it. The Session protocol is the only required
    /// protocol. The SessionEndpoints table may be extended with more protocol
    /// fields, but these extensions should retain ABI and API compatibility
    /// with existing (pre-compiled) clients.
    ///
    /// The response acknowledges the request to create a Session, but actual
    /// creation may happen later.
    pub fn r#create_session_t(
        &self,
        mut endpoints: SessionEndpoints,
    ) -> fidl::client::QueryResponseFut<(), fidl::encoding::DefaultFuchsiaResourceDialect> {
        ScenicProxyInterface::r#create_session_t(self, endpoints)
    }

    /// Get information about the Scenic's primary display.
    pub fn r#get_display_info(
        &self,
    ) -> fidl::client::QueryResponseFut<
        fidl_fuchsia_ui_gfx::DisplayInfo,
        fidl::encoding::DefaultFuchsiaResourceDialect,
    > {
        ScenicProxyInterface::r#get_display_info(self)
    }

    /// Gets an event signaled with displayOwnedSignal or displayNotOwnedSignal
    /// when display ownership changes.
    pub fn r#get_display_ownership_event(
        &self,
    ) -> fidl::client::QueryResponseFut<fidl::Event, fidl::encoding::DefaultFuchsiaResourceDialect>
    {
        ScenicProxyInterface::r#get_display_ownership_event(self)
    }

    /// Take a screenshot and return the data in `img_data`. `img_data` will
    /// not contain BGRA data if `success` is false.
    pub fn r#take_screenshot(
        &self,
    ) -> fidl::client::QueryResponseFut<
        (ScreenshotData, bool),
        fidl::encoding::DefaultFuchsiaResourceDialect,
    > {
        ScenicProxyInterface::r#take_screenshot(self)
    }

    /// Returns whether the clients should use [`fuchsia.ui.composition/Flatland`] protocol to
    /// interact with Scenic instead.
    pub fn r#uses_flatland(
        &self,
    ) -> fidl::client::QueryResponseFut<bool, fidl::encoding::DefaultFuchsiaResourceDialect> {
        ScenicProxyInterface::r#uses_flatland(self)
    }
}

impl ScenicProxyInterface for ScenicProxy {
    fn r#create_session(
        &self,
        mut session: fidl::endpoints::ServerEnd<SessionMarker>,
        mut listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
    ) -> Result<(), fidl::Error> {
        self.client.send::<ScenicCreateSessionRequest>(
            (session, listener),
            0x2af781f341771a50,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    fn r#create_session2(
        &self,
        mut session: fidl::endpoints::ServerEnd<SessionMarker>,
        mut listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
        mut view_focuser: Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>,
    ) -> Result<(), fidl::Error> {
        self.client.send::<ScenicCreateSession2Request>(
            (session, listener, view_focuser),
            0x11fa60f776121fa5,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    type CreateSessionTResponseFut =
        fidl::client::QueryResponseFut<(), fidl::encoding::DefaultFuchsiaResourceDialect>;
    fn r#create_session_t(
        &self,
        mut endpoints: SessionEndpoints,
    ) -> Self::CreateSessionTResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<(), fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                fidl::encoding::EmptyPayload,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x369061a897552d4f,
            >(_buf?)?;
            Ok(_response)
        }
        self.client.send_query_and_decode::<ScenicCreateSessionTRequest, ()>(
            (&mut endpoints,),
            0x369061a897552d4f,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }

    type GetDisplayInfoResponseFut = fidl::client::QueryResponseFut<
        fidl_fuchsia_ui_gfx::DisplayInfo,
        fidl::encoding::DefaultFuchsiaResourceDialect,
    >;
    fn r#get_display_info(&self) -> Self::GetDisplayInfoResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<fidl_fuchsia_ui_gfx::DisplayInfo, fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                ScenicGetDisplayInfoResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x3e4cdecbf7cc1797,
            >(_buf?)?;
            Ok(_response.info)
        }
        self.client.send_query_and_decode::<
            fidl::encoding::EmptyPayload,
            fidl_fuchsia_ui_gfx::DisplayInfo,
        >(
            (),
            0x3e4cdecbf7cc1797,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }

    type GetDisplayOwnershipEventResponseFut =
        fidl::client::QueryResponseFut<fidl::Event, fidl::encoding::DefaultFuchsiaResourceDialect>;
    fn r#get_display_ownership_event(&self) -> Self::GetDisplayOwnershipEventResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<fidl::Event, fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                ScenicGetDisplayOwnershipEventResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x54c114c7322b24d6,
            >(_buf?)?;
            Ok(_response.ownership_event)
        }
        self.client.send_query_and_decode::<fidl::encoding::EmptyPayload, fidl::Event>(
            (),
            0x54c114c7322b24d6,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }

    type TakeScreenshotResponseFut = fidl::client::QueryResponseFut<
        (ScreenshotData, bool),
        fidl::encoding::DefaultFuchsiaResourceDialect,
    >;
    fn r#take_screenshot(&self) -> Self::TakeScreenshotResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<(ScreenshotData, bool), fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                ScenicTakeScreenshotResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x53f5e06463987df2,
            >(_buf?)?;
            Ok((_response.img_data, _response.success))
        }
        self.client.send_query_and_decode::<fidl::encoding::EmptyPayload, (ScreenshotData, bool)>(
            (),
            0x53f5e06463987df2,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }

    type UsesFlatlandResponseFut =
        fidl::client::QueryResponseFut<bool, fidl::encoding::DefaultFuchsiaResourceDialect>;
    fn r#uses_flatland(&self) -> Self::UsesFlatlandResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<bool, fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                ScenicUsesFlatlandResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x5f2e5e19463ae706,
            >(_buf?)?;
            Ok(_response.flatland_enabled)
        }
        self.client.send_query_and_decode::<fidl::encoding::EmptyPayload, bool>(
            (),
            0x5f2e5e19463ae706,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }
}

pub struct ScenicEventStream {
    event_receiver: fidl::client::EventReceiver<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl std::marker::Unpin for ScenicEventStream {}

impl futures::stream::FusedStream for ScenicEventStream {
    fn is_terminated(&self) -> bool {
        self.event_receiver.is_terminated()
    }
}

impl futures::Stream for ScenicEventStream {
    type Item = Result<ScenicEvent, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        match futures::ready!(futures::stream::StreamExt::poll_next_unpin(
            &mut self.event_receiver,
            cx
        )?) {
            Some(buf) => std::task::Poll::Ready(Some(ScenicEvent::decode(buf))),
            None => std::task::Poll::Ready(None),
        }
    }
}

#[derive(Debug)]
pub enum ScenicEvent {}

impl ScenicEvent {
    /// Decodes a message buffer as a [`ScenicEvent`].
    fn decode(
        mut buf: <fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc,
    ) -> Result<ScenicEvent, fidl::Error> {
        let (bytes, _handles) = buf.split_mut();
        let (tx_header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;
        debug_assert_eq!(tx_header.tx_id, 0);
        match tx_header.ordinal {
            _ => Err(fidl::Error::UnknownOrdinal {
                ordinal: tx_header.ordinal,
                protocol_name: <ScenicMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
            }),
        }
    }
}

/// A Stream of incoming requests for fuchsia.ui.scenic/Scenic.
pub struct ScenicRequestStream {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
    is_terminated: bool,
}

impl std::marker::Unpin for ScenicRequestStream {}

impl futures::stream::FusedStream for ScenicRequestStream {
    fn is_terminated(&self) -> bool {
        self.is_terminated
    }
}

impl fidl::endpoints::RequestStream for ScenicRequestStream {
    type Protocol = ScenicMarker;
    type ControlHandle = ScenicControlHandle;

    fn from_channel(channel: ::fidl::AsyncChannel) -> Self {
        Self { inner: std::sync::Arc::new(fidl::ServeInner::new(channel)), is_terminated: false }
    }

    fn control_handle(&self) -> Self::ControlHandle {
        ScenicControlHandle { inner: self.inner.clone() }
    }

    fn into_inner(
        self,
    ) -> (::std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>, bool)
    {
        (self.inner, self.is_terminated)
    }

    fn from_inner(
        inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
        is_terminated: bool,
    ) -> Self {
        Self { inner, is_terminated }
    }
}

impl futures::Stream for ScenicRequestStream {
    type Item = Result<ScenicRequest, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        let this = &mut *self;
        if this.inner.check_shutdown(cx) {
            this.is_terminated = true;
            return std::task::Poll::Ready(None);
        }
        if this.is_terminated {
            panic!("polled ScenicRequestStream after completion");
        }
        fidl::encoding::with_tls_decode_buf::<_, fidl::encoding::DefaultFuchsiaResourceDialect>(
            |bytes, handles| {
                match this.inner.channel().read_etc(cx, bytes, handles) {
                    std::task::Poll::Ready(Ok(())) => {}
                    std::task::Poll::Pending => return std::task::Poll::Pending,
                    std::task::Poll::Ready(Err(zx_status::Status::PEER_CLOSED)) => {
                        this.is_terminated = true;
                        return std::task::Poll::Ready(None);
                    }
                    std::task::Poll::Ready(Err(e)) => {
                        return std::task::Poll::Ready(Some(Err(fidl::Error::ServerRequestRead(
                            e.into(),
                        ))));
                    }
                }

                // A message has been received from the channel
                let (header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;

                std::task::Poll::Ready(Some(match header.ordinal {
                    0x2af781f341771a50 => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            ScenicCreateSessionRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<ScenicCreateSessionRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ScenicControlHandle { inner: this.inner.clone() };
                        Ok(ScenicRequest::CreateSession {
                            session: req.session,
                            listener: req.listener,

                            control_handle,
                        })
                    }
                    0x11fa60f776121fa5 => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            ScenicCreateSession2Request,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<ScenicCreateSession2Request>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ScenicControlHandle { inner: this.inner.clone() };
                        Ok(ScenicRequest::CreateSession2 {
                            session: req.session,
                            listener: req.listener,
                            view_focuser: req.view_focuser,

                            control_handle,
                        })
                    }
                    0x369061a897552d4f => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            ScenicCreateSessionTRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<ScenicCreateSessionTRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ScenicControlHandle { inner: this.inner.clone() };
                        Ok(ScenicRequest::CreateSessionT {
                            endpoints: req.endpoints,

                            responder: ScenicCreateSessionTResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x3e4cdecbf7cc1797 => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            fidl::encoding::EmptyPayload,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<fidl::encoding::EmptyPayload>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ScenicControlHandle { inner: this.inner.clone() };
                        Ok(ScenicRequest::GetDisplayInfo {
                            responder: ScenicGetDisplayInfoResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x54c114c7322b24d6 => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            fidl::encoding::EmptyPayload,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<fidl::encoding::EmptyPayload>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ScenicControlHandle { inner: this.inner.clone() };
                        Ok(ScenicRequest::GetDisplayOwnershipEvent {
                            responder: ScenicGetDisplayOwnershipEventResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x53f5e06463987df2 => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            fidl::encoding::EmptyPayload,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<fidl::encoding::EmptyPayload>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ScenicControlHandle { inner: this.inner.clone() };
                        Ok(ScenicRequest::TakeScreenshot {
                            responder: ScenicTakeScreenshotResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x5f2e5e19463ae706 => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            fidl::encoding::EmptyPayload,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<fidl::encoding::EmptyPayload>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ScenicControlHandle { inner: this.inner.clone() };
                        Ok(ScenicRequest::UsesFlatland {
                            responder: ScenicUsesFlatlandResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    _ => Err(fidl::Error::UnknownOrdinal {
                        ordinal: header.ordinal,
                        protocol_name:
                            <ScenicMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
                    }),
                }))
            },
        )
    }
}

#[derive(Debug)]
pub enum ScenicRequest {
    /// Create a new Session, which is the primary way to interact with Scenic.
    CreateSession {
        session: fidl::endpoints::ServerEnd<SessionMarker>,
        listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
        control_handle: ScenicControlHandle,
    },
    /// Create a new Session, which is the primary way to interact with Scenic.
    ///
    /// In this variant, the caller may register a request for focus management.
    /// The `view_focuser`'s client is coupled to the requested `session`, and
    /// this coupling acts as a security boundary: the ViewRef used as the basis
    /// for authority by `view_focuser` must come from `session`.
    CreateSession2 {
        session: fidl::endpoints::ServerEnd<SessionMarker>,
        listener: Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
        view_focuser: Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>,
        control_handle: ScenicControlHandle,
    },
    /// Create a new Session, which is the primary way to interact with Scenic.
    ///
    /// In this variant, the caller may submit a combination of protocols
    /// that make sense for it. The Session protocol is the only required
    /// protocol. The SessionEndpoints table may be extended with more protocol
    /// fields, but these extensions should retain ABI and API compatibility
    /// with existing (pre-compiled) clients.
    ///
    /// The response acknowledges the request to create a Session, but actual
    /// creation may happen later.
    CreateSessionT { endpoints: SessionEndpoints, responder: ScenicCreateSessionTResponder },
    /// Get information about the Scenic's primary display.
    GetDisplayInfo { responder: ScenicGetDisplayInfoResponder },
    /// Gets an event signaled with displayOwnedSignal or displayNotOwnedSignal
    /// when display ownership changes.
    GetDisplayOwnershipEvent { responder: ScenicGetDisplayOwnershipEventResponder },
    /// Take a screenshot and return the data in `img_data`. `img_data` will
    /// not contain BGRA data if `success` is false.
    TakeScreenshot { responder: ScenicTakeScreenshotResponder },
    /// Returns whether the clients should use [`fuchsia.ui.composition/Flatland`] protocol to
    /// interact with Scenic instead.
    UsesFlatland { responder: ScenicUsesFlatlandResponder },
}

impl ScenicRequest {
    #[allow(irrefutable_let_patterns)]
    pub fn into_create_session(
        self,
    ) -> Option<(
        fidl::endpoints::ServerEnd<SessionMarker>,
        Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
        ScenicControlHandle,
    )> {
        if let ScenicRequest::CreateSession { session, listener, control_handle } = self {
            Some((session, listener, control_handle))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_create_session2(
        self,
    ) -> Option<(
        fidl::endpoints::ServerEnd<SessionMarker>,
        Option<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
        Option<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>,
        ScenicControlHandle,
    )> {
        if let ScenicRequest::CreateSession2 { session, listener, view_focuser, control_handle } =
            self
        {
            Some((session, listener, view_focuser, control_handle))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_create_session_t(
        self,
    ) -> Option<(SessionEndpoints, ScenicCreateSessionTResponder)> {
        if let ScenicRequest::CreateSessionT { endpoints, responder } = self {
            Some((endpoints, responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_get_display_info(self) -> Option<(ScenicGetDisplayInfoResponder)> {
        if let ScenicRequest::GetDisplayInfo { responder } = self {
            Some((responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_get_display_ownership_event(
        self,
    ) -> Option<(ScenicGetDisplayOwnershipEventResponder)> {
        if let ScenicRequest::GetDisplayOwnershipEvent { responder } = self {
            Some((responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_take_screenshot(self) -> Option<(ScenicTakeScreenshotResponder)> {
        if let ScenicRequest::TakeScreenshot { responder } = self {
            Some((responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_uses_flatland(self) -> Option<(ScenicUsesFlatlandResponder)> {
        if let ScenicRequest::UsesFlatland { responder } = self { Some((responder)) } else { None }
    }

    /// Name of the method defined in FIDL
    pub fn method_name(&self) -> &'static str {
        match *self {
            ScenicRequest::CreateSession { .. } => "create_session",
            ScenicRequest::CreateSession2 { .. } => "create_session2",
            ScenicRequest::CreateSessionT { .. } => "create_session_t",
            ScenicRequest::GetDisplayInfo { .. } => "get_display_info",
            ScenicRequest::GetDisplayOwnershipEvent { .. } => "get_display_ownership_event",
            ScenicRequest::TakeScreenshot { .. } => "take_screenshot",
            ScenicRequest::UsesFlatland { .. } => "uses_flatland",
        }
    }
}

#[derive(Debug, Clone)]
pub struct ScenicControlHandle {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
}

impl fidl::endpoints::ControlHandle for ScenicControlHandle {
    fn shutdown(&self) {
        self.inner.shutdown()
    }

    fn shutdown_with_epitaph(&self, status: zx_status::Status) {
        self.inner.shutdown_with_epitaph(status)
    }

    fn is_closed(&self) -> bool {
        self.inner.channel().is_closed()
    }
    fn on_closed(&self) -> fidl::OnSignalsRef<'_> {
        self.inner.channel().on_closed()
    }

    #[cfg(target_os = "fuchsia")]
    fn signal_peer(
        &self,
        clear_mask: zx::Signals,
        set_mask: zx::Signals,
    ) -> Result<(), zx_status::Status> {
        use fidl::Peered;
        self.inner.channel().signal_peer(clear_mask, set_mask)
    }
}

impl ScenicControlHandle {}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct ScenicCreateSessionTResponder {
    control_handle: std::mem::ManuallyDrop<ScenicControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`ScenicControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for ScenicCreateSessionTResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for ScenicCreateSessionTResponder {
    type ControlHandle = ScenicControlHandle;

    fn control_handle(&self) -> &ScenicControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl ScenicCreateSessionTResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self) -> Result<(), fidl::Error> {
        let _result = self.send_raw();
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(self) -> Result<(), fidl::Error> {
        let _result = self.send_raw();
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<fidl::encoding::EmptyPayload>(
            (),
            self.tx_id,
            0x369061a897552d4f,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct ScenicGetDisplayInfoResponder {
    control_handle: std::mem::ManuallyDrop<ScenicControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`ScenicControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for ScenicGetDisplayInfoResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for ScenicGetDisplayInfoResponder {
    type ControlHandle = ScenicControlHandle;

    fn control_handle(&self) -> &ScenicControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl ScenicGetDisplayInfoResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self, mut info: &fidl_fuchsia_ui_gfx::DisplayInfo) -> Result<(), fidl::Error> {
        let _result = self.send_raw(info);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(
        self,
        mut info: &fidl_fuchsia_ui_gfx::DisplayInfo,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(info);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self, mut info: &fidl_fuchsia_ui_gfx::DisplayInfo) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<ScenicGetDisplayInfoResponse>(
            (info,),
            self.tx_id,
            0x3e4cdecbf7cc1797,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct ScenicGetDisplayOwnershipEventResponder {
    control_handle: std::mem::ManuallyDrop<ScenicControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`ScenicControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for ScenicGetDisplayOwnershipEventResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for ScenicGetDisplayOwnershipEventResponder {
    type ControlHandle = ScenicControlHandle;

    fn control_handle(&self) -> &ScenicControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl ScenicGetDisplayOwnershipEventResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self, mut ownership_event: fidl::Event) -> Result<(), fidl::Error> {
        let _result = self.send_raw(ownership_event);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(
        self,
        mut ownership_event: fidl::Event,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(ownership_event);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self, mut ownership_event: fidl::Event) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<ScenicGetDisplayOwnershipEventResponse>(
            (ownership_event,),
            self.tx_id,
            0x54c114c7322b24d6,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct ScenicTakeScreenshotResponder {
    control_handle: std::mem::ManuallyDrop<ScenicControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`ScenicControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for ScenicTakeScreenshotResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for ScenicTakeScreenshotResponder {
    type ControlHandle = ScenicControlHandle;

    fn control_handle(&self) -> &ScenicControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl ScenicTakeScreenshotResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self, mut img_data: ScreenshotData, mut success: bool) -> Result<(), fidl::Error> {
        let _result = self.send_raw(img_data, success);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(
        self,
        mut img_data: ScreenshotData,
        mut success: bool,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(img_data, success);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self, mut img_data: ScreenshotData, mut success: bool) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<ScenicTakeScreenshotResponse>(
            (&mut img_data, success),
            self.tx_id,
            0x53f5e06463987df2,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct ScenicUsesFlatlandResponder {
    control_handle: std::mem::ManuallyDrop<ScenicControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`ScenicControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for ScenicUsesFlatlandResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for ScenicUsesFlatlandResponder {
    type ControlHandle = ScenicControlHandle;

    fn control_handle(&self) -> &ScenicControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl ScenicUsesFlatlandResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self, mut flatland_enabled: bool) -> Result<(), fidl::Error> {
        let _result = self.send_raw(flatland_enabled);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(self, mut flatland_enabled: bool) -> Result<(), fidl::Error> {
        let _result = self.send_raw(flatland_enabled);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self, mut flatland_enabled: bool) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<ScenicUsesFlatlandResponse>(
            (flatland_enabled,),
            self.tx_id,
            0x5f2e5e19463ae706,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct SessionMarker;

impl fidl::endpoints::ProtocolMarker for SessionMarker {
    type Proxy = SessionProxy;
    type RequestStream = SessionRequestStream;
    #[cfg(target_os = "fuchsia")]
    type SynchronousProxy = SessionSynchronousProxy;

    const DEBUG_NAME: &'static str = "(anonymous) Session";
}

pub trait SessionProxyInterface: Send + Sync {
    fn r#enqueue(&self, cmds: Vec<Command>) -> Result<(), fidl::Error>;
    type PresentResponseFut: std::future::Future<Output = Result<fidl_fuchsia_images::PresentationInfo, fidl::Error>>
        + Send;
    fn r#present(
        &self,
        presentation_time: u64,
        acquire_fences: Vec<fidl::Event>,
        release_fences: Vec<fidl::Event>,
    ) -> Self::PresentResponseFut;
    type Present2ResponseFut: std::future::Future<
            Output = Result<fidl_fuchsia_scenic_scheduling::FuturePresentationTimes, fidl::Error>,
        > + Send;
    fn r#present2(&self, args: Present2Args) -> Self::Present2ResponseFut;
    type RequestPresentationTimesResponseFut: std::future::Future<
            Output = Result<fidl_fuchsia_scenic_scheduling::FuturePresentationTimes, fidl::Error>,
        > + Send;
    fn r#request_presentation_times(
        &self,
        requested_prediction_span: i64,
    ) -> Self::RequestPresentationTimesResponseFut;
    fn r#register_buffer_collection(
        &self,
        buffer_id: u32,
        token: fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
    ) -> Result<(), fidl::Error>;
    fn r#deregister_buffer_collection(&self, buffer_id: u32) -> Result<(), fidl::Error>;
    fn r#set_debug_name(&self, debug_name: &str) -> Result<(), fidl::Error>;
}
#[derive(Debug)]
#[cfg(target_os = "fuchsia")]
pub struct SessionSynchronousProxy {
    client: fidl::client::sync::Client,
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::SynchronousProxy for SessionSynchronousProxy {
    type Proxy = SessionProxy;
    type Protocol = SessionMarker;

    fn from_channel(inner: fidl::Channel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    fn as_channel(&self) -> &fidl::Channel {
        self.client.as_channel()
    }
}

#[cfg(target_os = "fuchsia")]
impl SessionSynchronousProxy {
    pub fn new(channel: fidl::Channel) -> Self {
        Self { client: fidl::client::sync::Client::new(channel) }
    }

    pub fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    /// Waits until an event arrives and returns it. It is safe for other
    /// threads to make concurrent requests while waiting for an event.
    pub fn wait_for_event(
        &self,
        deadline: zx::MonotonicInstant,
    ) -> Result<SessionEvent, fidl::Error> {
        SessionEvent::decode(self.client.wait_for_event::<SessionMarker>(deadline)?)
    }

    pub fn r#enqueue(&self, mut cmds: Vec<Command>) -> Result<(), fidl::Error> {
        self.client.send::<SessionEnqueueRequest>(
            (cmds.as_mut(),),
            0x61e1e8b2cb6b0852,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    /// Present all previously enqueued operations.  In order to pipeline the
    /// preparation of the resources required to render the scene, two lists of
    /// fences (implemented as events) are passed.
    ///
    /// SCHEDULING PRESENTATION
    ///
    /// `presentation_time` specifies the time on or after which the
    /// client would like the enqueued operations should take visible effect
    /// (light up pixels on the screen), expressed in nanoseconds in the
    /// `CLOCK_MONOTONIC` timebase.  Desired presentation times must be
    /// monotonically non-decreasing.
    ///
    /// Using a desired presentation time in the present or past (such as 0)
    /// schedules enqueued operations to take visible effect as soon as possible
    /// (during the next frame to be prepared).
    ///
    /// Using a desired presentation time in the future schedules the enqueued
    /// operations to take visible effect as closely as possible to or after
    /// the stated time (but no earlier).
    ///
    /// Each rendered frame has a target presentation time.  Before rendering
    /// a frame, the scene manager applies all enqueued operations associated
    /// with all prior calls to `Present()` whose desired presentation time
    /// is on or before the frame's target presentation time.
    ///
    /// The `Present()` method does not return until the scene manager begins
    /// preparing the first frame which includes its presented content.
    /// Upon return, the `PresentationInfo` provides timing information for the
    /// frame which includes the presented content.
    ///
    /// To present new content on each successive frame, wait for `Present()`
    /// to return before calling `Present()` again with content for the next
    /// frame.
    ///
    /// It is also possible to enqueue and present successive frames of content
    /// all at once with increasing desired presentation times, incrementing by
    /// `PresentationInfo.presentation_interval` for each one.
    ///
    /// Animation updates are also coordinated in terms of presentation time.
    ///
    /// SYNCHRONIZATION
    ///
    /// `acquire_fences` are used by Scenic to wait until all of the session's
    /// resources are ready to render (or to allow downstream components, such as
    /// the Vulkan driver, to wait for these resources).
    ///
    /// For example, Fuchsia's Vulkan driver allows an zx::event to be obtained
    /// from a VkSemaphore.  This allows a Scenic client to submit a Vulkan command
    /// buffer to generate images/meshes/etc., and instructing Vulkan to signal a
    /// VkSemaphore when it is done.  By inserting the zx::event corresponding to
    /// this semaphore into `acquire_fences`, the client allows Scenic to submit work
    /// to the Vulkan driver without waiting on the CPU for the event to be
    /// signalled.
    ///
    /// `release_fences` is a list of events that will be signalled by Scenic when
    /// the updated session state has been fully committed: future frames will be
    /// rendered using this state, and all frames generated using previous session
    /// states have been fully-rendered and presented to the display.
    ///
    /// Together, `acquire_fences` and `release_fences` are intended to allow clients
    /// to implement strategies such as double-buffering.  For example, a client
    /// might do the following in the Scenic subsystem:
    ///   1) create two Image with resource IDs #1 and #2.
    ///   2) create two Materials with resource IDs #3 and #4, which respectively
    ///      use Images #1 and #2 as their texture.
    ///   3) create a tree of Nodes and attach them to the scene.
    ///   4) set one of the nodes above, say #5, to use Material #3.
    ///   5) submit a Vulkan command-buffer which renders into Image #1, and
    ///      will signal a VkSemaphore.
    ///   6) call Present() with one acquire-fence (obtained from the VkSemaphore
    ///      above) and one newly-created release-fence.
    ///
    /// After the steps above, Scenic will use the committed session state to render
    /// frames whenever necessary.  When the client wants to display something
    /// different than Image #1, it would do something similar to steps 4) to 6):
    ///   7) set Node #5 to use Material #4.
    ///   8) submit a Vulkan command-buffer which renders into Image #1, and
    ///      will signal a VkSemaphore.
    ///   9) call Present() with one acquire-fence (obtained from the VkSemaphore
    ///      above) and one newly-created release-fence.
    ///
    /// Finally, to continually draw new content, the client could repeat steps
    /// 4) to 9), with one important difference: step 5) must wait on the event
    /// signalled by step 9).  Otherwise, it might render into Image #1 while that
    /// image is still being used by Scenic to render a frame.  Similarly, step 8)
    /// must wait on the event signalled by step 6).
    ///
    /// The scenario described above uses one acquire-fence and one release-fence,
    /// but it is easy to imagine cases that require more.  For example, in addition
    /// to using Vulkan to render into Images #1 and #2, the client might also
    /// upload other resources to Vulkan on a different VkQueue, which would
    /// would signal a separate semaphore, and therefore require an additional
    /// acquire-fence.
    ///
    /// Note: `acquire_fences` and `release_fences` are only necessary to synchronize
    /// access to memory (and other external resources).  Any modification to
    /// resources made via the Session API are automatically synchronized.
    pub fn r#present(
        &self,
        mut presentation_time: u64,
        mut acquire_fences: Vec<fidl::Event>,
        mut release_fences: Vec<fidl::Event>,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<fidl_fuchsia_images::PresentationInfo, fidl::Error> {
        let _response = self
            .client
            .send_query::<SessionPresentRequest, SessionPresentResponse, SessionMarker>(
                (presentation_time, acquire_fences.as_mut(), release_fences.as_mut()),
                0x36967062cdd2c37e,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok(_response.presentation_info)
    }

    /// Present all previously enqueued operations. In order to pipeline the
    /// preparation of the resources required to render the scene, two lists of
    /// fences, implemented as events, are passed.
    ///
    /// When a client calls Present2, they receive an immediate callback
    /// consisting of the same information they would get as if they had called
    /// `RequestPresentationTimes` with the equivalent
    /// `requested_prediction_span`. See its documentation below for more
    /// information, as Present2's functionality is a superset of it.
    ///
    /// Then, when the commands flushed by Present2 make it to display, an
    /// `OnFramePresented` event is fired. This event includes information
    /// pertaining to all Present2s that had content that were part of that
    /// frame.
    ///
    /// Clients may only use one of Present/Present2 per Session.
    /// Switching between both is an error that will result in the Session being
    /// closed.
    ///
    /// See `Present2Args` documentation above for more detailed information on
    /// what arguments are passed in and their role.
    pub fn r#present2(
        &self,
        mut args: Present2Args,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<fidl_fuchsia_scenic_scheduling::FuturePresentationTimes, fidl::Error> {
        let _response = self
            .client
            .send_query::<SessionPresent2Request, SessionPresent2Response, SessionMarker>(
                (&mut args,),
                0x5d307d6198d76a65,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok(_response.request_presentation_times_info)
    }

    /// Returns information about future presentation times, and their
    /// respective latch points. Clients can use the returned information to
    /// make informed scheduling decisions: if a client wants their frame to be
    /// displayed at a given `presentation_time`, they should aim to have all
    /// `acquire_fences` fired before the associated `latch_point`.
    ///
    /// Scenic will attempt to return predictions that span a duration equal to
    /// `requested_prediction_span`, up to a limit.
    ///
    /// A value of 0 is guaranteed to give at least one future presentation info.
    pub fn r#request_presentation_times(
        &self,
        mut requested_prediction_span: i64,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<fidl_fuchsia_scenic_scheduling::FuturePresentationTimes, fidl::Error> {
        let _response = self.client.send_query::<
            SessionRequestPresentationTimesRequest,
            SessionRequestPresentationTimesResponse,
            SessionMarker,
        >(
            (requested_prediction_span,),
            0x14a087997bf83904,
            fidl::encoding::DynamicFlags::empty(),
            ___deadline,
        )?;
        Ok(_response.request_presentation_times_info)
    }

    /// Registers BufferCollection referenced by the `token` and sets contraints on it.
    /// It does not block on the buffers being allocated until content backed by one of the
    /// collection's VMOs is created, e.g. an Image2.
    ///
    /// A value of 0 for the `buffer_id` is invalid. All other values are valid as long as they
    /// are not currently in use.
    pub fn r#register_buffer_collection(
        &self,
        mut buffer_id: u32,
        mut token: fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
    ) -> Result<(), fidl::Error> {
        self.client.send::<SessionRegisterBufferCollectionRequest>(
            (buffer_id, token),
            0x141b0d5768c5ecf8,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    /// Deregisters the BufferCollection previously registered with the `buffer_id` and sets it
    /// to be garbage collected as soon as it is no longer referenced by any resources.
    ///
    /// Only `buffer_id` that have been previously registered and not yet deregistered are valid.
    pub fn r#deregister_buffer_collection(&self, mut buffer_id: u32) -> Result<(), fidl::Error> {
        self.client.send::<SessionDeregisterBufferCollectionRequest>(
            (buffer_id,),
            0x34e6c5c26b6cdb1e,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    /// Set an optional debug name for the session. The debug name will be
    /// output in things such as logging and trace events.
    pub fn r#set_debug_name(&self, mut debug_name: &str) -> Result<(), fidl::Error> {
        self.client.send::<SessionSetDebugNameRequest>(
            (debug_name,),
            0xdb157bf88f57b91,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[cfg(target_os = "fuchsia")]
impl From<SessionSynchronousProxy> for zx::NullableHandle {
    fn from(value: SessionSynchronousProxy) -> Self {
        value.into_channel().into()
    }
}

#[cfg(target_os = "fuchsia")]
impl From<fidl::Channel> for SessionSynchronousProxy {
    fn from(value: fidl::Channel) -> Self {
        Self::new(value)
    }
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::FromClient for SessionSynchronousProxy {
    type Protocol = SessionMarker;

    fn from_client(value: fidl::endpoints::ClientEnd<SessionMarker>) -> Self {
        Self::new(value.into_channel())
    }
}

#[derive(Debug, Clone)]
pub struct SessionProxy {
    client: fidl::client::Client<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl fidl::endpoints::Proxy for SessionProxy {
    type Protocol = SessionMarker;

    fn from_channel(inner: ::fidl::AsyncChannel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> Result<::fidl::AsyncChannel, Self> {
        self.client.into_channel().map_err(|client| Self { client })
    }

    fn as_channel(&self) -> &::fidl::AsyncChannel {
        self.client.as_channel()
    }
}

impl SessionProxy {
    /// Create a new Proxy for fuchsia.ui.scenic/Session.
    pub fn new(channel: ::fidl::AsyncChannel) -> Self {
        let protocol_name = <SessionMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME;
        Self { client: fidl::client::Client::new(channel, protocol_name) }
    }

    /// Get a Stream of events from the remote end of the protocol.
    ///
    /// # Panics
    ///
    /// Panics if the event stream was already taken.
    pub fn take_event_stream(&self) -> SessionEventStream {
        SessionEventStream { event_receiver: self.client.take_event_receiver() }
    }

    pub fn r#enqueue(&self, mut cmds: Vec<Command>) -> Result<(), fidl::Error> {
        SessionProxyInterface::r#enqueue(self, cmds)
    }

    /// Present all previously enqueued operations.  In order to pipeline the
    /// preparation of the resources required to render the scene, two lists of
    /// fences (implemented as events) are passed.
    ///
    /// SCHEDULING PRESENTATION
    ///
    /// `presentation_time` specifies the time on or after which the
    /// client would like the enqueued operations should take visible effect
    /// (light up pixels on the screen), expressed in nanoseconds in the
    /// `CLOCK_MONOTONIC` timebase.  Desired presentation times must be
    /// monotonically non-decreasing.
    ///
    /// Using a desired presentation time in the present or past (such as 0)
    /// schedules enqueued operations to take visible effect as soon as possible
    /// (during the next frame to be prepared).
    ///
    /// Using a desired presentation time in the future schedules the enqueued
    /// operations to take visible effect as closely as possible to or after
    /// the stated time (but no earlier).
    ///
    /// Each rendered frame has a target presentation time.  Before rendering
    /// a frame, the scene manager applies all enqueued operations associated
    /// with all prior calls to `Present()` whose desired presentation time
    /// is on or before the frame's target presentation time.
    ///
    /// The `Present()` method does not return until the scene manager begins
    /// preparing the first frame which includes its presented content.
    /// Upon return, the `PresentationInfo` provides timing information for the
    /// frame which includes the presented content.
    ///
    /// To present new content on each successive frame, wait for `Present()`
    /// to return before calling `Present()` again with content for the next
    /// frame.
    ///
    /// It is also possible to enqueue and present successive frames of content
    /// all at once with increasing desired presentation times, incrementing by
    /// `PresentationInfo.presentation_interval` for each one.
    ///
    /// Animation updates are also coordinated in terms of presentation time.
    ///
    /// SYNCHRONIZATION
    ///
    /// `acquire_fences` are used by Scenic to wait until all of the session's
    /// resources are ready to render (or to allow downstream components, such as
    /// the Vulkan driver, to wait for these resources).
    ///
    /// For example, Fuchsia's Vulkan driver allows an zx::event to be obtained
    /// from a VkSemaphore.  This allows a Scenic client to submit a Vulkan command
    /// buffer to generate images/meshes/etc., and instructing Vulkan to signal a
    /// VkSemaphore when it is done.  By inserting the zx::event corresponding to
    /// this semaphore into `acquire_fences`, the client allows Scenic to submit work
    /// to the Vulkan driver without waiting on the CPU for the event to be
    /// signalled.
    ///
    /// `release_fences` is a list of events that will be signalled by Scenic when
    /// the updated session state has been fully committed: future frames will be
    /// rendered using this state, and all frames generated using previous session
    /// states have been fully-rendered and presented to the display.
    ///
    /// Together, `acquire_fences` and `release_fences` are intended to allow clients
    /// to implement strategies such as double-buffering.  For example, a client
    /// might do the following in the Scenic subsystem:
    ///   1) create two Image with resource IDs #1 and #2.
    ///   2) create two Materials with resource IDs #3 and #4, which respectively
    ///      use Images #1 and #2 as their texture.
    ///   3) create a tree of Nodes and attach them to the scene.
    ///   4) set one of the nodes above, say #5, to use Material #3.
    ///   5) submit a Vulkan command-buffer which renders into Image #1, and
    ///      will signal a VkSemaphore.
    ///   6) call Present() with one acquire-fence (obtained from the VkSemaphore
    ///      above) and one newly-created release-fence.
    ///
    /// After the steps above, Scenic will use the committed session state to render
    /// frames whenever necessary.  When the client wants to display something
    /// different than Image #1, it would do something similar to steps 4) to 6):
    ///   7) set Node #5 to use Material #4.
    ///   8) submit a Vulkan command-buffer which renders into Image #1, and
    ///      will signal a VkSemaphore.
    ///   9) call Present() with one acquire-fence (obtained from the VkSemaphore
    ///      above) and one newly-created release-fence.
    ///
    /// Finally, to continually draw new content, the client could repeat steps
    /// 4) to 9), with one important difference: step 5) must wait on the event
    /// signalled by step 9).  Otherwise, it might render into Image #1 while that
    /// image is still being used by Scenic to render a frame.  Similarly, step 8)
    /// must wait on the event signalled by step 6).
    ///
    /// The scenario described above uses one acquire-fence and one release-fence,
    /// but it is easy to imagine cases that require more.  For example, in addition
    /// to using Vulkan to render into Images #1 and #2, the client might also
    /// upload other resources to Vulkan on a different VkQueue, which would
    /// would signal a separate semaphore, and therefore require an additional
    /// acquire-fence.
    ///
    /// Note: `acquire_fences` and `release_fences` are only necessary to synchronize
    /// access to memory (and other external resources).  Any modification to
    /// resources made via the Session API are automatically synchronized.
    pub fn r#present(
        &self,
        mut presentation_time: u64,
        mut acquire_fences: Vec<fidl::Event>,
        mut release_fences: Vec<fidl::Event>,
    ) -> fidl::client::QueryResponseFut<
        fidl_fuchsia_images::PresentationInfo,
        fidl::encoding::DefaultFuchsiaResourceDialect,
    > {
        SessionProxyInterface::r#present(self, presentation_time, acquire_fences, release_fences)
    }

    /// Present all previously enqueued operations. In order to pipeline the
    /// preparation of the resources required to render the scene, two lists of
    /// fences, implemented as events, are passed.
    ///
    /// When a client calls Present2, they receive an immediate callback
    /// consisting of the same information they would get as if they had called
    /// `RequestPresentationTimes` with the equivalent
    /// `requested_prediction_span`. See its documentation below for more
    /// information, as Present2's functionality is a superset of it.
    ///
    /// Then, when the commands flushed by Present2 make it to display, an
    /// `OnFramePresented` event is fired. This event includes information
    /// pertaining to all Present2s that had content that were part of that
    /// frame.
    ///
    /// Clients may only use one of Present/Present2 per Session.
    /// Switching between both is an error that will result in the Session being
    /// closed.
    ///
    /// See `Present2Args` documentation above for more detailed information on
    /// what arguments are passed in and their role.
    pub fn r#present2(
        &self,
        mut args: Present2Args,
    ) -> fidl::client::QueryResponseFut<
        fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
        fidl::encoding::DefaultFuchsiaResourceDialect,
    > {
        SessionProxyInterface::r#present2(self, args)
    }

    /// Returns information about future presentation times, and their
    /// respective latch points. Clients can use the returned information to
    /// make informed scheduling decisions: if a client wants their frame to be
    /// displayed at a given `presentation_time`, they should aim to have all
    /// `acquire_fences` fired before the associated `latch_point`.
    ///
    /// Scenic will attempt to return predictions that span a duration equal to
    /// `requested_prediction_span`, up to a limit.
    ///
    /// A value of 0 is guaranteed to give at least one future presentation info.
    pub fn r#request_presentation_times(
        &self,
        mut requested_prediction_span: i64,
    ) -> fidl::client::QueryResponseFut<
        fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
        fidl::encoding::DefaultFuchsiaResourceDialect,
    > {
        SessionProxyInterface::r#request_presentation_times(self, requested_prediction_span)
    }

    /// Registers BufferCollection referenced by the `token` and sets contraints on it.
    /// It does not block on the buffers being allocated until content backed by one of the
    /// collection's VMOs is created, e.g. an Image2.
    ///
    /// A value of 0 for the `buffer_id` is invalid. All other values are valid as long as they
    /// are not currently in use.
    pub fn r#register_buffer_collection(
        &self,
        mut buffer_id: u32,
        mut token: fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
    ) -> Result<(), fidl::Error> {
        SessionProxyInterface::r#register_buffer_collection(self, buffer_id, token)
    }

    /// Deregisters the BufferCollection previously registered with the `buffer_id` and sets it
    /// to be garbage collected as soon as it is no longer referenced by any resources.
    ///
    /// Only `buffer_id` that have been previously registered and not yet deregistered are valid.
    pub fn r#deregister_buffer_collection(&self, mut buffer_id: u32) -> Result<(), fidl::Error> {
        SessionProxyInterface::r#deregister_buffer_collection(self, buffer_id)
    }

    /// Set an optional debug name for the session. The debug name will be
    /// output in things such as logging and trace events.
    pub fn r#set_debug_name(&self, mut debug_name: &str) -> Result<(), fidl::Error> {
        SessionProxyInterface::r#set_debug_name(self, debug_name)
    }
}

impl SessionProxyInterface for SessionProxy {
    fn r#enqueue(&self, mut cmds: Vec<Command>) -> Result<(), fidl::Error> {
        self.client.send::<SessionEnqueueRequest>(
            (cmds.as_mut(),),
            0x61e1e8b2cb6b0852,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    type PresentResponseFut = fidl::client::QueryResponseFut<
        fidl_fuchsia_images::PresentationInfo,
        fidl::encoding::DefaultFuchsiaResourceDialect,
    >;
    fn r#present(
        &self,
        mut presentation_time: u64,
        mut acquire_fences: Vec<fidl::Event>,
        mut release_fences: Vec<fidl::Event>,
    ) -> Self::PresentResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<fidl_fuchsia_images::PresentationInfo, fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                SessionPresentResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x36967062cdd2c37e,
            >(_buf?)?;
            Ok(_response.presentation_info)
        }
        self.client
            .send_query_and_decode::<SessionPresentRequest, fidl_fuchsia_images::PresentationInfo>(
                (presentation_time, acquire_fences.as_mut(), release_fences.as_mut()),
                0x36967062cdd2c37e,
                fidl::encoding::DynamicFlags::empty(),
                _decode,
            )
    }

    type Present2ResponseFut = fidl::client::QueryResponseFut<
        fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
        fidl::encoding::DefaultFuchsiaResourceDialect,
    >;
    fn r#present2(&self, mut args: Present2Args) -> Self::Present2ResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<fidl_fuchsia_scenic_scheduling::FuturePresentationTimes, fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                SessionPresent2Response,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x5d307d6198d76a65,
            >(_buf?)?;
            Ok(_response.request_presentation_times_info)
        }
        self.client.send_query_and_decode::<
            SessionPresent2Request,
            fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
        >(
            (&mut args,),
            0x5d307d6198d76a65,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }

    type RequestPresentationTimesResponseFut = fidl::client::QueryResponseFut<
        fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
        fidl::encoding::DefaultFuchsiaResourceDialect,
    >;
    fn r#request_presentation_times(
        &self,
        mut requested_prediction_span: i64,
    ) -> Self::RequestPresentationTimesResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<fidl_fuchsia_scenic_scheduling::FuturePresentationTimes, fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                SessionRequestPresentationTimesResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x14a087997bf83904,
            >(_buf?)?;
            Ok(_response.request_presentation_times_info)
        }
        self.client.send_query_and_decode::<
            SessionRequestPresentationTimesRequest,
            fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
        >(
            (requested_prediction_span,),
            0x14a087997bf83904,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }

    fn r#register_buffer_collection(
        &self,
        mut buffer_id: u32,
        mut token: fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
    ) -> Result<(), fidl::Error> {
        self.client.send::<SessionRegisterBufferCollectionRequest>(
            (buffer_id, token),
            0x141b0d5768c5ecf8,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    fn r#deregister_buffer_collection(&self, mut buffer_id: u32) -> Result<(), fidl::Error> {
        self.client.send::<SessionDeregisterBufferCollectionRequest>(
            (buffer_id,),
            0x34e6c5c26b6cdb1e,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    fn r#set_debug_name(&self, mut debug_name: &str) -> Result<(), fidl::Error> {
        self.client.send::<SessionSetDebugNameRequest>(
            (debug_name,),
            0xdb157bf88f57b91,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

pub struct SessionEventStream {
    event_receiver: fidl::client::EventReceiver<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl std::marker::Unpin for SessionEventStream {}

impl futures::stream::FusedStream for SessionEventStream {
    fn is_terminated(&self) -> bool {
        self.event_receiver.is_terminated()
    }
}

impl futures::Stream for SessionEventStream {
    type Item = Result<SessionEvent, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        match futures::ready!(futures::stream::StreamExt::poll_next_unpin(
            &mut self.event_receiver,
            cx
        )?) {
            Some(buf) => std::task::Poll::Ready(Some(SessionEvent::decode(buf))),
            None => std::task::Poll::Ready(None),
        }
    }
}

#[derive(Debug)]
pub enum SessionEvent {
    OnFramePresented { frame_presented_info: fidl_fuchsia_scenic_scheduling::FramePresentedInfo },
}

impl SessionEvent {
    #[allow(irrefutable_let_patterns)]
    pub fn into_on_frame_presented(
        self,
    ) -> Option<fidl_fuchsia_scenic_scheduling::FramePresentedInfo> {
        if let SessionEvent::OnFramePresented { frame_presented_info } = self {
            Some((frame_presented_info))
        } else {
            None
        }
    }

    /// Decodes a message buffer as a [`SessionEvent`].
    fn decode(
        mut buf: <fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc,
    ) -> Result<SessionEvent, fidl::Error> {
        let (bytes, _handles) = buf.split_mut();
        let (tx_header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;
        debug_assert_eq!(tx_header.tx_id, 0);
        match tx_header.ordinal {
            0x26e3bdd1559be16b => {
                let mut out = fidl::new_empty!(
                    SessionOnFramePresentedRequest,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                );
                fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionOnFramePresentedRequest>(&tx_header, _body_bytes, _handles, &mut out)?;
                Ok((SessionEvent::OnFramePresented {
                    frame_presented_info: out.frame_presented_info,
                }))
            }
            _ => Err(fidl::Error::UnknownOrdinal {
                ordinal: tx_header.ordinal,
                protocol_name: <SessionMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
            }),
        }
    }
}

/// A Stream of incoming requests for fuchsia.ui.scenic/Session.
pub struct SessionRequestStream {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
    is_terminated: bool,
}

impl std::marker::Unpin for SessionRequestStream {}

impl futures::stream::FusedStream for SessionRequestStream {
    fn is_terminated(&self) -> bool {
        self.is_terminated
    }
}

impl fidl::endpoints::RequestStream for SessionRequestStream {
    type Protocol = SessionMarker;
    type ControlHandle = SessionControlHandle;

    fn from_channel(channel: ::fidl::AsyncChannel) -> Self {
        Self { inner: std::sync::Arc::new(fidl::ServeInner::new(channel)), is_terminated: false }
    }

    fn control_handle(&self) -> Self::ControlHandle {
        SessionControlHandle { inner: self.inner.clone() }
    }

    fn into_inner(
        self,
    ) -> (::std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>, bool)
    {
        (self.inner, self.is_terminated)
    }

    fn from_inner(
        inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
        is_terminated: bool,
    ) -> Self {
        Self { inner, is_terminated }
    }
}

impl futures::Stream for SessionRequestStream {
    type Item = Result<SessionRequest, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        let this = &mut *self;
        if this.inner.check_shutdown(cx) {
            this.is_terminated = true;
            return std::task::Poll::Ready(None);
        }
        if this.is_terminated {
            panic!("polled SessionRequestStream after completion");
        }
        fidl::encoding::with_tls_decode_buf::<_, fidl::encoding::DefaultFuchsiaResourceDialect>(
            |bytes, handles| {
                match this.inner.channel().read_etc(cx, bytes, handles) {
                    std::task::Poll::Ready(Ok(())) => {}
                    std::task::Poll::Pending => return std::task::Poll::Pending,
                    std::task::Poll::Ready(Err(zx_status::Status::PEER_CLOSED)) => {
                        this.is_terminated = true;
                        return std::task::Poll::Ready(None);
                    }
                    std::task::Poll::Ready(Err(e)) => {
                        return std::task::Poll::Ready(Some(Err(fidl::Error::ServerRequestRead(
                            e.into(),
                        ))));
                    }
                }

                // A message has been received from the channel
                let (header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;

                std::task::Poll::Ready(Some(match header.ordinal {
                    0x61e1e8b2cb6b0852 => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            SessionEnqueueRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionEnqueueRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = SessionControlHandle { inner: this.inner.clone() };
                        Ok(SessionRequest::Enqueue { cmds: req.cmds, control_handle })
                    }
                    0x36967062cdd2c37e => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            SessionPresentRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionPresentRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = SessionControlHandle { inner: this.inner.clone() };
                        Ok(SessionRequest::Present {
                            presentation_time: req.presentation_time,
                            acquire_fences: req.acquire_fences,
                            release_fences: req.release_fences,

                            responder: SessionPresentResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x5d307d6198d76a65 => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            SessionPresent2Request,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionPresent2Request>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = SessionControlHandle { inner: this.inner.clone() };
                        Ok(SessionRequest::Present2 {
                            args: req.args,

                            responder: SessionPresent2Responder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x14a087997bf83904 => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            SessionRequestPresentationTimesRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionRequestPresentationTimesRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = SessionControlHandle { inner: this.inner.clone() };
                        Ok(SessionRequest::RequestPresentationTimes {
                            requested_prediction_span: req.requested_prediction_span,

                            responder: SessionRequestPresentationTimesResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x141b0d5768c5ecf8 => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            SessionRegisterBufferCollectionRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionRegisterBufferCollectionRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = SessionControlHandle { inner: this.inner.clone() };
                        Ok(SessionRequest::RegisterBufferCollection {
                            buffer_id: req.buffer_id,
                            token: req.token,

                            control_handle,
                        })
                    }
                    0x34e6c5c26b6cdb1e => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            SessionDeregisterBufferCollectionRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionDeregisterBufferCollectionRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = SessionControlHandle { inner: this.inner.clone() };
                        Ok(SessionRequest::DeregisterBufferCollection {
                            buffer_id: req.buffer_id,

                            control_handle,
                        })
                    }
                    0xdb157bf88f57b91 => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            SessionSetDebugNameRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionSetDebugNameRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = SessionControlHandle { inner: this.inner.clone() };
                        Ok(SessionRequest::SetDebugName {
                            debug_name: req.debug_name,

                            control_handle,
                        })
                    }
                    _ => Err(fidl::Error::UnknownOrdinal {
                        ordinal: header.ordinal,
                        protocol_name:
                            <SessionMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
                    }),
                }))
            },
        )
    }
}

/// Client use Sessions to interact with a Scenic instance by enqueuing commands
/// that create or modify resources.
#[derive(Debug)]
pub enum SessionRequest {
    Enqueue {
        cmds: Vec<Command>,
        control_handle: SessionControlHandle,
    },
    /// Present all previously enqueued operations.  In order to pipeline the
    /// preparation of the resources required to render the scene, two lists of
    /// fences (implemented as events) are passed.
    ///
    /// SCHEDULING PRESENTATION
    ///
    /// `presentation_time` specifies the time on or after which the
    /// client would like the enqueued operations should take visible effect
    /// (light up pixels on the screen), expressed in nanoseconds in the
    /// `CLOCK_MONOTONIC` timebase.  Desired presentation times must be
    /// monotonically non-decreasing.
    ///
    /// Using a desired presentation time in the present or past (such as 0)
    /// schedules enqueued operations to take visible effect as soon as possible
    /// (during the next frame to be prepared).
    ///
    /// Using a desired presentation time in the future schedules the enqueued
    /// operations to take visible effect as closely as possible to or after
    /// the stated time (but no earlier).
    ///
    /// Each rendered frame has a target presentation time.  Before rendering
    /// a frame, the scene manager applies all enqueued operations associated
    /// with all prior calls to `Present()` whose desired presentation time
    /// is on or before the frame's target presentation time.
    ///
    /// The `Present()` method does not return until the scene manager begins
    /// preparing the first frame which includes its presented content.
    /// Upon return, the `PresentationInfo` provides timing information for the
    /// frame which includes the presented content.
    ///
    /// To present new content on each successive frame, wait for `Present()`
    /// to return before calling `Present()` again with content for the next
    /// frame.
    ///
    /// It is also possible to enqueue and present successive frames of content
    /// all at once with increasing desired presentation times, incrementing by
    /// `PresentationInfo.presentation_interval` for each one.
    ///
    /// Animation updates are also coordinated in terms of presentation time.
    ///
    /// SYNCHRONIZATION
    ///
    /// `acquire_fences` are used by Scenic to wait until all of the session's
    /// resources are ready to render (or to allow downstream components, such as
    /// the Vulkan driver, to wait for these resources).
    ///
    /// For example, Fuchsia's Vulkan driver allows an zx::event to be obtained
    /// from a VkSemaphore.  This allows a Scenic client to submit a Vulkan command
    /// buffer to generate images/meshes/etc., and instructing Vulkan to signal a
    /// VkSemaphore when it is done.  By inserting the zx::event corresponding to
    /// this semaphore into `acquire_fences`, the client allows Scenic to submit work
    /// to the Vulkan driver without waiting on the CPU for the event to be
    /// signalled.
    ///
    /// `release_fences` is a list of events that will be signalled by Scenic when
    /// the updated session state has been fully committed: future frames will be
    /// rendered using this state, and all frames generated using previous session
    /// states have been fully-rendered and presented to the display.
    ///
    /// Together, `acquire_fences` and `release_fences` are intended to allow clients
    /// to implement strategies such as double-buffering.  For example, a client
    /// might do the following in the Scenic subsystem:
    ///   1) create two Image with resource IDs #1 and #2.
    ///   2) create two Materials with resource IDs #3 and #4, which respectively
    ///      use Images #1 and #2 as their texture.
    ///   3) create a tree of Nodes and attach them to the scene.
    ///   4) set one of the nodes above, say #5, to use Material #3.
    ///   5) submit a Vulkan command-buffer which renders into Image #1, and
    ///      will signal a VkSemaphore.
    ///   6) call Present() with one acquire-fence (obtained from the VkSemaphore
    ///      above) and one newly-created release-fence.
    ///
    /// After the steps above, Scenic will use the committed session state to render
    /// frames whenever necessary.  When the client wants to display something
    /// different than Image #1, it would do something similar to steps 4) to 6):
    ///   7) set Node #5 to use Material #4.
    ///   8) submit a Vulkan command-buffer which renders into Image #1, and
    ///      will signal a VkSemaphore.
    ///   9) call Present() with one acquire-fence (obtained from the VkSemaphore
    ///      above) and one newly-created release-fence.
    ///
    /// Finally, to continually draw new content, the client could repeat steps
    /// 4) to 9), with one important difference: step 5) must wait on the event
    /// signalled by step 9).  Otherwise, it might render into Image #1 while that
    /// image is still being used by Scenic to render a frame.  Similarly, step 8)
    /// must wait on the event signalled by step 6).
    ///
    /// The scenario described above uses one acquire-fence and one release-fence,
    /// but it is easy to imagine cases that require more.  For example, in addition
    /// to using Vulkan to render into Images #1 and #2, the client might also
    /// upload other resources to Vulkan on a different VkQueue, which would
    /// would signal a separate semaphore, and therefore require an additional
    /// acquire-fence.
    ///
    /// Note: `acquire_fences` and `release_fences` are only necessary to synchronize
    /// access to memory (and other external resources).  Any modification to
    /// resources made via the Session API are automatically synchronized.
    Present {
        presentation_time: u64,
        acquire_fences: Vec<fidl::Event>,
        release_fences: Vec<fidl::Event>,
        responder: SessionPresentResponder,
    },
    /// Present all previously enqueued operations. In order to pipeline the
    /// preparation of the resources required to render the scene, two lists of
    /// fences, implemented as events, are passed.
    ///
    /// When a client calls Present2, they receive an immediate callback
    /// consisting of the same information they would get as if they had called
    /// `RequestPresentationTimes` with the equivalent
    /// `requested_prediction_span`. See its documentation below for more
    /// information, as Present2's functionality is a superset of it.
    ///
    /// Then, when the commands flushed by Present2 make it to display, an
    /// `OnFramePresented` event is fired. This event includes information
    /// pertaining to all Present2s that had content that were part of that
    /// frame.
    ///
    /// Clients may only use one of Present/Present2 per Session.
    /// Switching between both is an error that will result in the Session being
    /// closed.
    ///
    /// See `Present2Args` documentation above for more detailed information on
    /// what arguments are passed in and their role.
    Present2 {
        args: Present2Args,
        responder: SessionPresent2Responder,
    },
    /// Returns information about future presentation times, and their
    /// respective latch points. Clients can use the returned information to
    /// make informed scheduling decisions: if a client wants their frame to be
    /// displayed at a given `presentation_time`, they should aim to have all
    /// `acquire_fences` fired before the associated `latch_point`.
    ///
    /// Scenic will attempt to return predictions that span a duration equal to
    /// `requested_prediction_span`, up to a limit.
    ///
    /// A value of 0 is guaranteed to give at least one future presentation info.
    RequestPresentationTimes {
        requested_prediction_span: i64,
        responder: SessionRequestPresentationTimesResponder,
    },
    /// Registers BufferCollection referenced by the `token` and sets contraints on it.
    /// It does not block on the buffers being allocated until content backed by one of the
    /// collection's VMOs is created, e.g. an Image2.
    ///
    /// A value of 0 for the `buffer_id` is invalid. All other values are valid as long as they
    /// are not currently in use.
    RegisterBufferCollection {
        buffer_id: u32,
        token: fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
        control_handle: SessionControlHandle,
    },
    /// Deregisters the BufferCollection previously registered with the `buffer_id` and sets it
    /// to be garbage collected as soon as it is no longer referenced by any resources.
    ///
    /// Only `buffer_id` that have been previously registered and not yet deregistered are valid.
    DeregisterBufferCollection {
        buffer_id: u32,
        control_handle: SessionControlHandle,
    },
    /// Set an optional debug name for the session. The debug name will be
    /// output in things such as logging and trace events.
    SetDebugName {
        debug_name: String,
        control_handle: SessionControlHandle,
    },
}

impl SessionRequest {
    #[allow(irrefutable_let_patterns)]
    pub fn into_enqueue(self) -> Option<(Vec<Command>, SessionControlHandle)> {
        if let SessionRequest::Enqueue { cmds, control_handle } = self {
            Some((cmds, control_handle))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_present(
        self,
    ) -> Option<(u64, Vec<fidl::Event>, Vec<fidl::Event>, SessionPresentResponder)> {
        if let SessionRequest::Present {
            presentation_time,
            acquire_fences,
            release_fences,
            responder,
        } = self
        {
            Some((presentation_time, acquire_fences, release_fences, responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_present2(self) -> Option<(Present2Args, SessionPresent2Responder)> {
        if let SessionRequest::Present2 { args, responder } = self {
            Some((args, responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_request_presentation_times(
        self,
    ) -> Option<(i64, SessionRequestPresentationTimesResponder)> {
        if let SessionRequest::RequestPresentationTimes { requested_prediction_span, responder } =
            self
        {
            Some((requested_prediction_span, responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_register_buffer_collection(
        self,
    ) -> Option<(
        u32,
        fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
        SessionControlHandle,
    )> {
        if let SessionRequest::RegisterBufferCollection { buffer_id, token, control_handle } = self
        {
            Some((buffer_id, token, control_handle))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_deregister_buffer_collection(self) -> Option<(u32, SessionControlHandle)> {
        if let SessionRequest::DeregisterBufferCollection { buffer_id, control_handle } = self {
            Some((buffer_id, control_handle))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_set_debug_name(self) -> Option<(String, SessionControlHandle)> {
        if let SessionRequest::SetDebugName { debug_name, control_handle } = self {
            Some((debug_name, control_handle))
        } else {
            None
        }
    }

    /// Name of the method defined in FIDL
    pub fn method_name(&self) -> &'static str {
        match *self {
            SessionRequest::Enqueue { .. } => "enqueue",
            SessionRequest::Present { .. } => "present",
            SessionRequest::Present2 { .. } => "present2",
            SessionRequest::RequestPresentationTimes { .. } => "request_presentation_times",
            SessionRequest::RegisterBufferCollection { .. } => "register_buffer_collection",
            SessionRequest::DeregisterBufferCollection { .. } => "deregister_buffer_collection",
            SessionRequest::SetDebugName { .. } => "set_debug_name",
        }
    }
}

#[derive(Debug, Clone)]
pub struct SessionControlHandle {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
}

impl fidl::endpoints::ControlHandle for SessionControlHandle {
    fn shutdown(&self) {
        self.inner.shutdown()
    }

    fn shutdown_with_epitaph(&self, status: zx_status::Status) {
        self.inner.shutdown_with_epitaph(status)
    }

    fn is_closed(&self) -> bool {
        self.inner.channel().is_closed()
    }
    fn on_closed(&self) -> fidl::OnSignalsRef<'_> {
        self.inner.channel().on_closed()
    }

    #[cfg(target_os = "fuchsia")]
    fn signal_peer(
        &self,
        clear_mask: zx::Signals,
        set_mask: zx::Signals,
    ) -> Result<(), zx_status::Status> {
        use fidl::Peered;
        self.inner.channel().signal_peer(clear_mask, set_mask)
    }
}

impl SessionControlHandle {
    pub fn send_on_frame_presented(
        &self,
        mut frame_presented_info: &fidl_fuchsia_scenic_scheduling::FramePresentedInfo,
    ) -> Result<(), fidl::Error> {
        self.inner.send::<SessionOnFramePresentedRequest>(
            (frame_presented_info,),
            0,
            0x26e3bdd1559be16b,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct SessionPresentResponder {
    control_handle: std::mem::ManuallyDrop<SessionControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`SessionControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for SessionPresentResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for SessionPresentResponder {
    type ControlHandle = SessionControlHandle;

    fn control_handle(&self) -> &SessionControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl SessionPresentResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(
        self,
        mut presentation_info: &fidl_fuchsia_images::PresentationInfo,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(presentation_info);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(
        self,
        mut presentation_info: &fidl_fuchsia_images::PresentationInfo,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(presentation_info);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(
        &self,
        mut presentation_info: &fidl_fuchsia_images::PresentationInfo,
    ) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<SessionPresentResponse>(
            (presentation_info,),
            self.tx_id,
            0x36967062cdd2c37e,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct SessionPresent2Responder {
    control_handle: std::mem::ManuallyDrop<SessionControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`SessionControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for SessionPresent2Responder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for SessionPresent2Responder {
    type ControlHandle = SessionControlHandle;

    fn control_handle(&self) -> &SessionControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl SessionPresent2Responder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(
        self,
        mut request_presentation_times_info: &fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(request_presentation_times_info);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(
        self,
        mut request_presentation_times_info: &fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(request_presentation_times_info);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(
        &self,
        mut request_presentation_times_info: &fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
    ) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<SessionPresent2Response>(
            (request_presentation_times_info,),
            self.tx_id,
            0x5d307d6198d76a65,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct SessionRequestPresentationTimesResponder {
    control_handle: std::mem::ManuallyDrop<SessionControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`SessionControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for SessionRequestPresentationTimesResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for SessionRequestPresentationTimesResponder {
    type ControlHandle = SessionControlHandle;

    fn control_handle(&self) -> &SessionControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl SessionRequestPresentationTimesResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(
        self,
        mut request_presentation_times_info: &fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(request_presentation_times_info);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(
        self,
        mut request_presentation_times_info: &fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
    ) -> Result<(), fidl::Error> {
        let _result = self.send_raw(request_presentation_times_info);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(
        &self,
        mut request_presentation_times_info: &fidl_fuchsia_scenic_scheduling::FuturePresentationTimes,
    ) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<SessionRequestPresentationTimesResponse>(
            (request_presentation_times_info,),
            self.tx_id,
            0x14a087997bf83904,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct SessionListenerMarker;

impl fidl::endpoints::ProtocolMarker for SessionListenerMarker {
    type Proxy = SessionListenerProxy;
    type RequestStream = SessionListenerRequestStream;
    #[cfg(target_os = "fuchsia")]
    type SynchronousProxy = SessionListenerSynchronousProxy;

    const DEBUG_NAME: &'static str = "(anonymous) SessionListener";
}

pub trait SessionListenerProxyInterface: Send + Sync {
    fn r#on_scenic_error(&self, error: &str) -> Result<(), fidl::Error>;
    fn r#on_scenic_event(&self, events: Vec<Event>) -> Result<(), fidl::Error>;
}
#[derive(Debug)]
#[cfg(target_os = "fuchsia")]
pub struct SessionListenerSynchronousProxy {
    client: fidl::client::sync::Client,
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::SynchronousProxy for SessionListenerSynchronousProxy {
    type Proxy = SessionListenerProxy;
    type Protocol = SessionListenerMarker;

    fn from_channel(inner: fidl::Channel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    fn as_channel(&self) -> &fidl::Channel {
        self.client.as_channel()
    }
}

#[cfg(target_os = "fuchsia")]
impl SessionListenerSynchronousProxy {
    pub fn new(channel: fidl::Channel) -> Self {
        Self { client: fidl::client::sync::Client::new(channel) }
    }

    pub fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    /// Waits until an event arrives and returns it. It is safe for other
    /// threads to make concurrent requests while waiting for an event.
    pub fn wait_for_event(
        &self,
        deadline: zx::MonotonicInstant,
    ) -> Result<SessionListenerEvent, fidl::Error> {
        SessionListenerEvent::decode(self.client.wait_for_event::<SessionListenerMarker>(deadline)?)
    }

    /// Called when an error has occurred and the session will be torn down.
    pub fn r#on_scenic_error(&self, mut error: &str) -> Result<(), fidl::Error> {
        self.client.send::<SessionListenerOnScenicErrorRequest>(
            (error,),
            0x68095b89cb6c45f7,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    /// Called to deliver a batch of one or more events to the listener.
    /// Use `SetEventMaskCmd` to enable event delivery for a resource.
    pub fn r#on_scenic_event(&self, mut events: Vec<Event>) -> Result<(), fidl::Error> {
        self.client.send::<SessionListenerOnScenicEventRequest>(
            (events.as_mut(),),
            0x5f66bec36e87b3ea,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[cfg(target_os = "fuchsia")]
impl From<SessionListenerSynchronousProxy> for zx::NullableHandle {
    fn from(value: SessionListenerSynchronousProxy) -> Self {
        value.into_channel().into()
    }
}

#[cfg(target_os = "fuchsia")]
impl From<fidl::Channel> for SessionListenerSynchronousProxy {
    fn from(value: fidl::Channel) -> Self {
        Self::new(value)
    }
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::FromClient for SessionListenerSynchronousProxy {
    type Protocol = SessionListenerMarker;

    fn from_client(value: fidl::endpoints::ClientEnd<SessionListenerMarker>) -> Self {
        Self::new(value.into_channel())
    }
}

#[derive(Debug, Clone)]
pub struct SessionListenerProxy {
    client: fidl::client::Client<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl fidl::endpoints::Proxy for SessionListenerProxy {
    type Protocol = SessionListenerMarker;

    fn from_channel(inner: ::fidl::AsyncChannel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> Result<::fidl::AsyncChannel, Self> {
        self.client.into_channel().map_err(|client| Self { client })
    }

    fn as_channel(&self) -> &::fidl::AsyncChannel {
        self.client.as_channel()
    }
}

impl SessionListenerProxy {
    /// Create a new Proxy for fuchsia.ui.scenic/SessionListener.
    pub fn new(channel: ::fidl::AsyncChannel) -> Self {
        let protocol_name = <SessionListenerMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME;
        Self { client: fidl::client::Client::new(channel, protocol_name) }
    }

    /// Get a Stream of events from the remote end of the protocol.
    ///
    /// # Panics
    ///
    /// Panics if the event stream was already taken.
    pub fn take_event_stream(&self) -> SessionListenerEventStream {
        SessionListenerEventStream { event_receiver: self.client.take_event_receiver() }
    }

    /// Called when an error has occurred and the session will be torn down.
    pub fn r#on_scenic_error(&self, mut error: &str) -> Result<(), fidl::Error> {
        SessionListenerProxyInterface::r#on_scenic_error(self, error)
    }

    /// Called to deliver a batch of one or more events to the listener.
    /// Use `SetEventMaskCmd` to enable event delivery for a resource.
    pub fn r#on_scenic_event(&self, mut events: Vec<Event>) -> Result<(), fidl::Error> {
        SessionListenerProxyInterface::r#on_scenic_event(self, events)
    }
}

impl SessionListenerProxyInterface for SessionListenerProxy {
    fn r#on_scenic_error(&self, mut error: &str) -> Result<(), fidl::Error> {
        self.client.send::<SessionListenerOnScenicErrorRequest>(
            (error,),
            0x68095b89cb6c45f7,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    fn r#on_scenic_event(&self, mut events: Vec<Event>) -> Result<(), fidl::Error> {
        self.client.send::<SessionListenerOnScenicEventRequest>(
            (events.as_mut(),),
            0x5f66bec36e87b3ea,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

pub struct SessionListenerEventStream {
    event_receiver: fidl::client::EventReceiver<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl std::marker::Unpin for SessionListenerEventStream {}

impl futures::stream::FusedStream for SessionListenerEventStream {
    fn is_terminated(&self) -> bool {
        self.event_receiver.is_terminated()
    }
}

impl futures::Stream for SessionListenerEventStream {
    type Item = Result<SessionListenerEvent, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        match futures::ready!(futures::stream::StreamExt::poll_next_unpin(
            &mut self.event_receiver,
            cx
        )?) {
            Some(buf) => std::task::Poll::Ready(Some(SessionListenerEvent::decode(buf))),
            None => std::task::Poll::Ready(None),
        }
    }
}

#[derive(Debug)]
pub enum SessionListenerEvent {}

impl SessionListenerEvent {
    /// Decodes a message buffer as a [`SessionListenerEvent`].
    fn decode(
        mut buf: <fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc,
    ) -> Result<SessionListenerEvent, fidl::Error> {
        let (bytes, _handles) = buf.split_mut();
        let (tx_header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;
        debug_assert_eq!(tx_header.tx_id, 0);
        match tx_header.ordinal {
            _ => Err(fidl::Error::UnknownOrdinal {
                ordinal: tx_header.ordinal,
                protocol_name:
                    <SessionListenerMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
            }),
        }
    }
}

/// A Stream of incoming requests for fuchsia.ui.scenic/SessionListener.
pub struct SessionListenerRequestStream {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
    is_terminated: bool,
}

impl std::marker::Unpin for SessionListenerRequestStream {}

impl futures::stream::FusedStream for SessionListenerRequestStream {
    fn is_terminated(&self) -> bool {
        self.is_terminated
    }
}

impl fidl::endpoints::RequestStream for SessionListenerRequestStream {
    type Protocol = SessionListenerMarker;
    type ControlHandle = SessionListenerControlHandle;

    fn from_channel(channel: ::fidl::AsyncChannel) -> Self {
        Self { inner: std::sync::Arc::new(fidl::ServeInner::new(channel)), is_terminated: false }
    }

    fn control_handle(&self) -> Self::ControlHandle {
        SessionListenerControlHandle { inner: self.inner.clone() }
    }

    fn into_inner(
        self,
    ) -> (::std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>, bool)
    {
        (self.inner, self.is_terminated)
    }

    fn from_inner(
        inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
        is_terminated: bool,
    ) -> Self {
        Self { inner, is_terminated }
    }
}

impl futures::Stream for SessionListenerRequestStream {
    type Item = Result<SessionListenerRequest, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        let this = &mut *self;
        if this.inner.check_shutdown(cx) {
            this.is_terminated = true;
            return std::task::Poll::Ready(None);
        }
        if this.is_terminated {
            panic!("polled SessionListenerRequestStream after completion");
        }
        fidl::encoding::with_tls_decode_buf::<_, fidl::encoding::DefaultFuchsiaResourceDialect>(
            |bytes, handles| {
                match this.inner.channel().read_etc(cx, bytes, handles) {
                    std::task::Poll::Ready(Ok(())) => {}
                    std::task::Poll::Pending => return std::task::Poll::Pending,
                    std::task::Poll::Ready(Err(zx_status::Status::PEER_CLOSED)) => {
                        this.is_terminated = true;
                        return std::task::Poll::Ready(None);
                    }
                    std::task::Poll::Ready(Err(e)) => {
                        return std::task::Poll::Ready(Some(Err(fidl::Error::ServerRequestRead(
                            e.into(),
                        ))));
                    }
                }

                // A message has been received from the channel
                let (header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;

                std::task::Poll::Ready(Some(match header.ordinal {
                    0x68095b89cb6c45f7 => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            SessionListenerOnScenicErrorRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionListenerOnScenicErrorRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle =
                            SessionListenerControlHandle { inner: this.inner.clone() };
                        Ok(SessionListenerRequest::OnScenicError {
                            error: req.error,

                            control_handle,
                        })
                    }
                    0x5f66bec36e87b3ea => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            SessionListenerOnScenicEventRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<SessionListenerOnScenicEventRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle =
                            SessionListenerControlHandle { inner: this.inner.clone() };
                        Ok(SessionListenerRequest::OnScenicEvent {
                            events: req.events,

                            control_handle,
                        })
                    }
                    _ => Err(fidl::Error::UnknownOrdinal {
                        ordinal: header.ordinal,
                        protocol_name:
                            <SessionListenerMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
                    }),
                }))
            },
        )
    }
}

/// Listens for events which occur within the session.
#[derive(Debug)]
pub enum SessionListenerRequest {
    /// Called when an error has occurred and the session will be torn down.
    OnScenicError { error: String, control_handle: SessionListenerControlHandle },
    /// Called to deliver a batch of one or more events to the listener.
    /// Use `SetEventMaskCmd` to enable event delivery for a resource.
    OnScenicEvent { events: Vec<Event>, control_handle: SessionListenerControlHandle },
}

impl SessionListenerRequest {
    #[allow(irrefutable_let_patterns)]
    pub fn into_on_scenic_error(self) -> Option<(String, SessionListenerControlHandle)> {
        if let SessionListenerRequest::OnScenicError { error, control_handle } = self {
            Some((error, control_handle))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_on_scenic_event(self) -> Option<(Vec<Event>, SessionListenerControlHandle)> {
        if let SessionListenerRequest::OnScenicEvent { events, control_handle } = self {
            Some((events, control_handle))
        } else {
            None
        }
    }

    /// Name of the method defined in FIDL
    pub fn method_name(&self) -> &'static str {
        match *self {
            SessionListenerRequest::OnScenicError { .. } => "on_scenic_error",
            SessionListenerRequest::OnScenicEvent { .. } => "on_scenic_event",
        }
    }
}

#[derive(Debug, Clone)]
pub struct SessionListenerControlHandle {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
}

impl fidl::endpoints::ControlHandle for SessionListenerControlHandle {
    fn shutdown(&self) {
        self.inner.shutdown()
    }

    fn shutdown_with_epitaph(&self, status: zx_status::Status) {
        self.inner.shutdown_with_epitaph(status)
    }

    fn is_closed(&self) -> bool {
        self.inner.channel().is_closed()
    }
    fn on_closed(&self) -> fidl::OnSignalsRef<'_> {
        self.inner.channel().on_closed()
    }

    #[cfg(target_os = "fuchsia")]
    fn signal_peer(
        &self,
        clear_mask: zx::Signals,
        set_mask: zx::Signals,
    ) -> Result<(), zx_status::Status> {
        use fidl::Peered;
        self.inner.channel().signal_peer(clear_mask, set_mask)
    }
}

impl SessionListenerControlHandle {}

#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct SnapshotMarker;

impl fidl::endpoints::ProtocolMarker for SnapshotMarker {
    type Proxy = SnapshotProxy;
    type RequestStream = SnapshotRequestStream;
    #[cfg(target_os = "fuchsia")]
    type SynchronousProxy = SnapshotSynchronousProxy;

    const DEBUG_NAME: &'static str = "fuchsia.ui.scenic.Snapshot";
}
impl fidl::endpoints::DiscoverableProtocolMarker for SnapshotMarker {}

pub trait SnapshotProxyInterface: Send + Sync {}
#[derive(Debug)]
#[cfg(target_os = "fuchsia")]
pub struct SnapshotSynchronousProxy {
    client: fidl::client::sync::Client,
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::SynchronousProxy for SnapshotSynchronousProxy {
    type Proxy = SnapshotProxy;
    type Protocol = SnapshotMarker;

    fn from_channel(inner: fidl::Channel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    fn as_channel(&self) -> &fidl::Channel {
        self.client.as_channel()
    }
}

#[cfg(target_os = "fuchsia")]
impl SnapshotSynchronousProxy {
    pub fn new(channel: fidl::Channel) -> Self {
        Self { client: fidl::client::sync::Client::new(channel) }
    }

    pub fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    /// Waits until an event arrives and returns it. It is safe for other
    /// threads to make concurrent requests while waiting for an event.
    pub fn wait_for_event(
        &self,
        deadline: zx::MonotonicInstant,
    ) -> Result<SnapshotEvent, fidl::Error> {
        SnapshotEvent::decode(self.client.wait_for_event::<SnapshotMarker>(deadline)?)
    }
}

#[cfg(target_os = "fuchsia")]
impl From<SnapshotSynchronousProxy> for zx::NullableHandle {
    fn from(value: SnapshotSynchronousProxy) -> Self {
        value.into_channel().into()
    }
}

#[cfg(target_os = "fuchsia")]
impl From<fidl::Channel> for SnapshotSynchronousProxy {
    fn from(value: fidl::Channel) -> Self {
        Self::new(value)
    }
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::FromClient for SnapshotSynchronousProxy {
    type Protocol = SnapshotMarker;

    fn from_client(value: fidl::endpoints::ClientEnd<SnapshotMarker>) -> Self {
        Self::new(value.into_channel())
    }
}

#[derive(Debug, Clone)]
pub struct SnapshotProxy {
    client: fidl::client::Client<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl fidl::endpoints::Proxy for SnapshotProxy {
    type Protocol = SnapshotMarker;

    fn from_channel(inner: ::fidl::AsyncChannel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> Result<::fidl::AsyncChannel, Self> {
        self.client.into_channel().map_err(|client| Self { client })
    }

    fn as_channel(&self) -> &::fidl::AsyncChannel {
        self.client.as_channel()
    }
}

impl SnapshotProxy {
    /// Create a new Proxy for fuchsia.ui.scenic/Snapshot.
    pub fn new(channel: ::fidl::AsyncChannel) -> Self {
        let protocol_name = <SnapshotMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME;
        Self { client: fidl::client::Client::new(channel, protocol_name) }
    }

    /// Get a Stream of events from the remote end of the protocol.
    ///
    /// # Panics
    ///
    /// Panics if the event stream was already taken.
    pub fn take_event_stream(&self) -> SnapshotEventStream {
        SnapshotEventStream { event_receiver: self.client.take_event_receiver() }
    }
}

impl SnapshotProxyInterface for SnapshotProxy {}

pub struct SnapshotEventStream {
    event_receiver: fidl::client::EventReceiver<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl std::marker::Unpin for SnapshotEventStream {}

impl futures::stream::FusedStream for SnapshotEventStream {
    fn is_terminated(&self) -> bool {
        self.event_receiver.is_terminated()
    }
}

impl futures::Stream for SnapshotEventStream {
    type Item = Result<SnapshotEvent, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        match futures::ready!(futures::stream::StreamExt::poll_next_unpin(
            &mut self.event_receiver,
            cx
        )?) {
            Some(buf) => std::task::Poll::Ready(Some(SnapshotEvent::decode(buf))),
            None => std::task::Poll::Ready(None),
        }
    }
}

#[derive(Debug)]
pub enum SnapshotEvent {}

impl SnapshotEvent {
    /// Decodes a message buffer as a [`SnapshotEvent`].
    fn decode(
        mut buf: <fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc,
    ) -> Result<SnapshotEvent, fidl::Error> {
        let (bytes, _handles) = buf.split_mut();
        let (tx_header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;
        debug_assert_eq!(tx_header.tx_id, 0);
        match tx_header.ordinal {
            _ => Err(fidl::Error::UnknownOrdinal {
                ordinal: tx_header.ordinal,
                protocol_name: <SnapshotMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
            }),
        }
    }
}

/// A Stream of incoming requests for fuchsia.ui.scenic/Snapshot.
pub struct SnapshotRequestStream {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
    is_terminated: bool,
}

impl std::marker::Unpin for SnapshotRequestStream {}

impl futures::stream::FusedStream for SnapshotRequestStream {
    fn is_terminated(&self) -> bool {
        self.is_terminated
    }
}

impl fidl::endpoints::RequestStream for SnapshotRequestStream {
    type Protocol = SnapshotMarker;
    type ControlHandle = SnapshotControlHandle;

    fn from_channel(channel: ::fidl::AsyncChannel) -> Self {
        Self { inner: std::sync::Arc::new(fidl::ServeInner::new(channel)), is_terminated: false }
    }

    fn control_handle(&self) -> Self::ControlHandle {
        SnapshotControlHandle { inner: self.inner.clone() }
    }

    fn into_inner(
        self,
    ) -> (::std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>, bool)
    {
        (self.inner, self.is_terminated)
    }

    fn from_inner(
        inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
        is_terminated: bool,
    ) -> Self {
        Self { inner, is_terminated }
    }
}

impl futures::Stream for SnapshotRequestStream {
    type Item = Result<SnapshotRequest, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        let this = &mut *self;
        if this.inner.check_shutdown(cx) {
            this.is_terminated = true;
            return std::task::Poll::Ready(None);
        }
        if this.is_terminated {
            panic!("polled SnapshotRequestStream after completion");
        }
        fidl::encoding::with_tls_decode_buf::<_, fidl::encoding::DefaultFuchsiaResourceDialect>(
            |bytes, handles| {
                match this.inner.channel().read_etc(cx, bytes, handles) {
                    std::task::Poll::Ready(Ok(())) => {}
                    std::task::Poll::Pending => return std::task::Poll::Pending,
                    std::task::Poll::Ready(Err(zx_status::Status::PEER_CLOSED)) => {
                        this.is_terminated = true;
                        return std::task::Poll::Ready(None);
                    }
                    std::task::Poll::Ready(Err(e)) => {
                        return std::task::Poll::Ready(Some(Err(fidl::Error::ServerRequestRead(
                            e.into(),
                        ))));
                    }
                }

                // A message has been received from the channel
                let (header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;

                std::task::Poll::Ready(Some(match header.ordinal {
                    _ => Err(fidl::Error::UnknownOrdinal {
                        ordinal: header.ordinal,
                        protocol_name:
                            <SnapshotMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
                    }),
                }))
            },
        )
    }
}

/// Defines an interface to take view snapshots.
#[derive(Debug)]
pub enum SnapshotRequest {}

impl SnapshotRequest {
    /// Name of the method defined in FIDL
    pub fn method_name(&self) -> &'static str {
        match *self {}
    }
}

#[derive(Debug, Clone)]
pub struct SnapshotControlHandle {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
}

impl fidl::endpoints::ControlHandle for SnapshotControlHandle {
    fn shutdown(&self) {
        self.inner.shutdown()
    }

    fn shutdown_with_epitaph(&self, status: zx_status::Status) {
        self.inner.shutdown_with_epitaph(status)
    }

    fn is_closed(&self) -> bool {
        self.inner.channel().is_closed()
    }
    fn on_closed(&self) -> fidl::OnSignalsRef<'_> {
        self.inner.channel().on_closed()
    }

    #[cfg(target_os = "fuchsia")]
    fn signal_peer(
        &self,
        clear_mask: zx::Signals,
        set_mask: zx::Signals,
    ) -> Result<(), zx_status::Status> {
        use fidl::Peered;
        self.inner.channel().signal_peer(clear_mask, set_mask)
    }
}

impl SnapshotControlHandle {}

mod internal {
    use super::*;

    impl fidl::encoding::ResourceTypeMarker for ScenicCreateSession2Request {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ScenicCreateSession2Request {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            4
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            12
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            ScenicCreateSession2Request,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut ScenicCreateSession2Request
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicCreateSession2Request>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<ScenicCreateSession2Request, fidl::encoding::DefaultFuchsiaResourceDialect>::encode(
                (
                    <fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>> as fidl::encoding::ResourceTypeMarker>::take_or_borrow(&mut self.session),
                    <fidl::encoding::Optional<fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>> as fidl::encoding::ResourceTypeMarker>::take_or_borrow(&mut self.listener),
                    <fidl::encoding::Optional<fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>>> as fidl::encoding::ResourceTypeMarker>::take_or_borrow(&mut self.view_focuser),
                ),
                encoder, offset, _depth
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<
                fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
        T1: fidl::encoding::Encode<
                fidl::encoding::Optional<
                    fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
        T2: fidl::encoding::Encode<
                fidl::encoding::Optional<
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
    >
        fidl::encoding::Encode<
            ScenicCreateSession2Request,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0, T1, T2)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicCreateSession2Request>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 4, depth)?;
            self.2.encode(encoder, offset + 8, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ScenicCreateSession2Request
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                session: fidl::new_empty!(
                    fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
                listener: fidl::new_empty!(
                    fidl::encoding::Optional<
                        fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
                view_focuser: fidl::new_empty!(
                    fidl::encoding::Optional<
                        fidl::encoding::Endpoint<
                            fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>,
                        >,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.session,
                decoder,
                offset + 0,
                _depth
            )?;
            fidl::decode!(
                fidl::encoding::Optional<
                    fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.listener,
                decoder,
                offset + 4,
                _depth
            )?;
            fidl::decode!(
                fidl::encoding::Optional<
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.view_focuser,
                decoder,
                offset + 8,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for ScenicCreateSessionRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ScenicCreateSessionRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            4
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            8
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            ScenicCreateSessionRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut ScenicCreateSessionRequest
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicCreateSessionRequest>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<ScenicCreateSessionRequest, fidl::encoding::DefaultFuchsiaResourceDialect>::encode(
                (
                    <fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>> as fidl::encoding::ResourceTypeMarker>::take_or_borrow(&mut self.session),
                    <fidl::encoding::Optional<fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>> as fidl::encoding::ResourceTypeMarker>::take_or_borrow(&mut self.listener),
                ),
                encoder, offset, _depth
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<
                fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
        T1: fidl::encoding::Encode<
                fidl::encoding::Optional<
                    fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
    >
        fidl::encoding::Encode<
            ScenicCreateSessionRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0, T1)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicCreateSessionRequest>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 4, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ScenicCreateSessionRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                session: fidl::new_empty!(
                    fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
                listener: fidl::new_empty!(
                    fidl::encoding::Optional<
                        fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.session,
                decoder,
                offset + 0,
                _depth
            )?;
            fidl::decode!(
                fidl::encoding::Optional<
                    fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.listener,
                decoder,
                offset + 4,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for ScenicCreateSessionTRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ScenicCreateSessionTRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            ScenicCreateSessionTRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut ScenicCreateSessionTRequest
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicCreateSessionTRequest>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<
                ScenicCreateSessionTRequest,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >::encode(
                (<SessionEndpoints as fidl::encoding::ResourceTypeMarker>::take_or_borrow(
                    &mut self.endpoints,
                ),),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<SessionEndpoints, fidl::encoding::DefaultFuchsiaResourceDialect>,
    >
        fidl::encoding::Encode<
            ScenicCreateSessionTRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0,)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicCreateSessionTRequest>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ScenicCreateSessionTRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                endpoints: fidl::new_empty!(
                    SessionEndpoints,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                SessionEndpoints,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.endpoints,
                decoder,
                offset + 0,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for ScenicGetDisplayOwnershipEventResponse {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ScenicGetDisplayOwnershipEventResponse {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            4
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            4
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            ScenicGetDisplayOwnershipEventResponse,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut ScenicGetDisplayOwnershipEventResponse
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicGetDisplayOwnershipEventResponse>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<
                ScenicGetDisplayOwnershipEventResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >::encode(
                (<fidl::encoding::HandleType<
                    fidl::Event,
                    { fidl::ObjectType::EVENT.into_raw() },
                    2147483648,
                > as fidl::encoding::ResourceTypeMarker>::take_or_borrow(
                    &mut self.ownership_event,
                ),),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<
                fidl::encoding::HandleType<
                    fidl::Event,
                    { fidl::ObjectType::EVENT.into_raw() },
                    2147483648,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
    >
        fidl::encoding::Encode<
            ScenicGetDisplayOwnershipEventResponse,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0,)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicGetDisplayOwnershipEventResponse>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ScenicGetDisplayOwnershipEventResponse
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                ownership_event: fidl::new_empty!(fidl::encoding::HandleType<fidl::Event, { fidl::ObjectType::EVENT.into_raw() }, 2147483648>, fidl::encoding::DefaultFuchsiaResourceDialect),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(fidl::encoding::HandleType<fidl::Event, { fidl::ObjectType::EVENT.into_raw() }, 2147483648>, fidl::encoding::DefaultFuchsiaResourceDialect, &mut self.ownership_event, decoder, offset + 0, _depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for ScenicTakeScreenshotResponse {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ScenicTakeScreenshotResponse {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            56
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            ScenicTakeScreenshotResponse,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut ScenicTakeScreenshotResponse
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicTakeScreenshotResponse>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<
                ScenicTakeScreenshotResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >::encode(
                (
                    <ScreenshotData as fidl::encoding::ResourceTypeMarker>::take_or_borrow(
                        &mut self.img_data,
                    ),
                    <bool as fidl::encoding::ValueTypeMarker>::borrow(&self.success),
                ),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<ScreenshotData, fidl::encoding::DefaultFuchsiaResourceDialect>,
        T1: fidl::encoding::Encode<bool, fidl::encoding::DefaultFuchsiaResourceDialect>,
    >
        fidl::encoding::Encode<
            ScenicTakeScreenshotResponse,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0, T1)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScenicTakeScreenshotResponse>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            unsafe {
                let ptr = encoder.buf.as_mut_ptr().add(offset).offset(48);
                (ptr as *mut u64).write_unaligned(0);
            }
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 48, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ScenicTakeScreenshotResponse
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                img_data: fidl::new_empty!(
                    ScreenshotData,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
                success: fidl::new_empty!(bool, fidl::encoding::DefaultFuchsiaResourceDialect),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            let ptr = unsafe { decoder.buf.as_ptr().add(offset).offset(48) };
            let padval = unsafe { (ptr as *const u64).read_unaligned() };
            let mask = 0xffffffffffffff00u64;
            let maskedval = padval & mask;
            if maskedval != 0 {
                return Err(fidl::Error::NonZeroPadding {
                    padding_start: offset + 48 + ((mask as u64).trailing_zeros() / 8) as usize,
                });
            }
            fidl::decode!(
                ScreenshotData,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.img_data,
                decoder,
                offset + 0,
                _depth
            )?;
            fidl::decode!(
                bool,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.success,
                decoder,
                offset + 48,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for ScreenshotData {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ScreenshotData {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            48
        }
    }

    unsafe impl
        fidl::encoding::Encode<ScreenshotData, fidl::encoding::DefaultFuchsiaResourceDialect>
        for &mut ScreenshotData
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScreenshotData>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<ScreenshotData, fidl::encoding::DefaultFuchsiaResourceDialect>::encode(
                (
                    <fidl_fuchsia_images::ImageInfo as fidl::encoding::ValueTypeMarker>::borrow(&self.info),
                    <fidl_fuchsia_mem::Buffer as fidl::encoding::ResourceTypeMarker>::take_or_borrow(&mut self.data),
                ),
                encoder, offset, _depth
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<
                fidl_fuchsia_images::ImageInfo,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
        T1: fidl::encoding::Encode<
                fidl_fuchsia_mem::Buffer,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
    > fidl::encoding::Encode<ScreenshotData, fidl::encoding::DefaultFuchsiaResourceDialect>
        for (T0, T1)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ScreenshotData>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 32, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ScreenshotData
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                info: fidl::new_empty!(
                    fidl_fuchsia_images::ImageInfo,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
                data: fidl::new_empty!(
                    fidl_fuchsia_mem::Buffer,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                fidl_fuchsia_images::ImageInfo,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.info,
                decoder,
                offset + 0,
                _depth
            )?;
            fidl::decode!(
                fidl_fuchsia_mem::Buffer,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.data,
                decoder,
                offset + 32,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for SessionEnqueueRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for SessionEnqueueRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl
        fidl::encoding::Encode<SessionEnqueueRequest, fidl::encoding::DefaultFuchsiaResourceDialect>
        for &mut SessionEnqueueRequest
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionEnqueueRequest>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<SessionEnqueueRequest, fidl::encoding::DefaultFuchsiaResourceDialect>::encode(
                (
                    <fidl::encoding::UnboundedVector<Command> as fidl::encoding::ResourceTypeMarker>::take_or_borrow(&mut self.cmds),
                ),
                encoder, offset, _depth
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<
                fidl::encoding::UnboundedVector<Command>,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
    >
        fidl::encoding::Encode<SessionEnqueueRequest, fidl::encoding::DefaultFuchsiaResourceDialect>
        for (T0,)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionEnqueueRequest>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for SessionEnqueueRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                cmds: fidl::new_empty!(
                    fidl::encoding::UnboundedVector<Command>,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                fidl::encoding::UnboundedVector<Command>,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.cmds,
                decoder,
                offset + 0,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for SessionListenerOnScenicEventRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for SessionListenerOnScenicEventRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            SessionListenerOnScenicEventRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut SessionListenerOnScenicEventRequest
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionListenerOnScenicEventRequest>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<SessionListenerOnScenicEventRequest, fidl::encoding::DefaultFuchsiaResourceDialect>::encode(
                (
                    <fidl::encoding::UnboundedVector<Event> as fidl::encoding::ResourceTypeMarker>::take_or_borrow(&mut self.events),
                ),
                encoder, offset, _depth
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<
                fidl::encoding::UnboundedVector<Event>,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
    >
        fidl::encoding::Encode<
            SessionListenerOnScenicEventRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0,)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionListenerOnScenicEventRequest>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for SessionListenerOnScenicEventRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                events: fidl::new_empty!(
                    fidl::encoding::UnboundedVector<Event>,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                fidl::encoding::UnboundedVector<Event>,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.events,
                decoder,
                offset + 0,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for SessionPresent2Request {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for SessionPresent2Request {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            SessionPresent2Request,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut SessionPresent2Request
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionPresent2Request>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<
                SessionPresent2Request,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >::encode(
                (<Present2Args as fidl::encoding::ResourceTypeMarker>::take_or_borrow(
                    &mut self.args,
                ),),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<Present2Args, fidl::encoding::DefaultFuchsiaResourceDialect>,
    >
        fidl::encoding::Encode<
            SessionPresent2Request,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0,)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionPresent2Request>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for SessionPresent2Request
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                args: fidl::new_empty!(Present2Args, fidl::encoding::DefaultFuchsiaResourceDialect),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                Present2Args,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.args,
                decoder,
                offset + 0,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for SessionPresentRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for SessionPresentRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            40
        }
    }

    unsafe impl
        fidl::encoding::Encode<SessionPresentRequest, fidl::encoding::DefaultFuchsiaResourceDialect>
        for &mut SessionPresentRequest
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionPresentRequest>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<
                SessionPresentRequest,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >::encode(
                (
                    <u64 as fidl::encoding::ValueTypeMarker>::borrow(&self.presentation_time),
                    <fidl::encoding::UnboundedVector<
                        fidl::encoding::HandleType<
                            fidl::Event,
                            { fidl::ObjectType::EVENT.into_raw() },
                            2147483648,
                        >,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow(
                        &mut self.acquire_fences,
                    ),
                    <fidl::encoding::UnboundedVector<
                        fidl::encoding::HandleType<
                            fidl::Event,
                            { fidl::ObjectType::EVENT.into_raw() },
                            2147483648,
                        >,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow(
                        &mut self.release_fences,
                    ),
                ),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<u64, fidl::encoding::DefaultFuchsiaResourceDialect>,
        T1: fidl::encoding::Encode<
                fidl::encoding::UnboundedVector<
                    fidl::encoding::HandleType<
                        fidl::Event,
                        { fidl::ObjectType::EVENT.into_raw() },
                        2147483648,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
        T2: fidl::encoding::Encode<
                fidl::encoding::UnboundedVector<
                    fidl::encoding::HandleType<
                        fidl::Event,
                        { fidl::ObjectType::EVENT.into_raw() },
                        2147483648,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
    >
        fidl::encoding::Encode<SessionPresentRequest, fidl::encoding::DefaultFuchsiaResourceDialect>
        for (T0, T1, T2)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionPresentRequest>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 8, depth)?;
            self.2.encode(encoder, offset + 24, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for SessionPresentRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                presentation_time: fidl::new_empty!(
                    u64,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
                acquire_fences: fidl::new_empty!(
                    fidl::encoding::UnboundedVector<
                        fidl::encoding::HandleType<
                            fidl::Event,
                            { fidl::ObjectType::EVENT.into_raw() },
                            2147483648,
                        >,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
                release_fences: fidl::new_empty!(
                    fidl::encoding::UnboundedVector<
                        fidl::encoding::HandleType<
                            fidl::Event,
                            { fidl::ObjectType::EVENT.into_raw() },
                            2147483648,
                        >,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                u64,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.presentation_time,
                decoder,
                offset + 0,
                _depth
            )?;
            fidl::decode!(
                fidl::encoding::UnboundedVector<
                    fidl::encoding::HandleType<
                        fidl::Event,
                        { fidl::ObjectType::EVENT.into_raw() },
                        2147483648,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.acquire_fences,
                decoder,
                offset + 8,
                _depth
            )?;
            fidl::decode!(
                fidl::encoding::UnboundedVector<
                    fidl::encoding::HandleType<
                        fidl::Event,
                        { fidl::ObjectType::EVENT.into_raw() },
                        2147483648,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.release_fences,
                decoder,
                offset + 24,
                _depth
            )?;
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for SessionRegisterBufferCollectionRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for SessionRegisterBufferCollectionRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            4
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            8
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            SessionRegisterBufferCollectionRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut SessionRegisterBufferCollectionRequest
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionRegisterBufferCollectionRequest>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<
                SessionRegisterBufferCollectionRequest,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >::encode(
                (
                    <u32 as fidl::encoding::ValueTypeMarker>::borrow(&self.buffer_id),
                    <fidl::encoding::Endpoint<
                        fidl::endpoints::ClientEnd<
                            fidl_fuchsia_sysmem::BufferCollectionTokenMarker,
                        >,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow(
                        &mut self.token
                    ),
                ),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
        T0: fidl::encoding::Encode<u32, fidl::encoding::DefaultFuchsiaResourceDialect>,
        T1: fidl::encoding::Encode<
                fidl::encoding::Endpoint<
                    fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
    >
        fidl::encoding::Encode<
            SessionRegisterBufferCollectionRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0, T1)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionRegisterBufferCollectionRequest>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 4, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for SessionRegisterBufferCollectionRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                buffer_id: fidl::new_empty!(u32, fidl::encoding::DefaultFuchsiaResourceDialect),
                token: fidl::new_empty!(
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ClientEnd<
                            fidl_fuchsia_sysmem::BufferCollectionTokenMarker,
                        >,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                u32,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.buffer_id,
                decoder,
                offset + 0,
                _depth
            )?;
            fidl::decode!(
                fidl::encoding::Endpoint<
                    fidl::endpoints::ClientEnd<fidl_fuchsia_sysmem::BufferCollectionTokenMarker>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.token,
                decoder,
                offset + 4,
                _depth
            )?;
            Ok(())
        }
    }

    impl Present2Args {
        #[inline(always)]
        fn max_ordinal_present(&self) -> u64 {
            if let Some(_) = self.requested_prediction_span {
                return 4;
            }
            if let Some(_) = self.release_fences {
                return 3;
            }
            if let Some(_) = self.acquire_fences {
                return 2;
            }
            if let Some(_) = self.requested_presentation_time {
                return 1;
            }
            0
        }
    }

    impl fidl::encoding::ResourceTypeMarker for Present2Args {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for Present2Args {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl fidl::encoding::Encode<Present2Args, fidl::encoding::DefaultFuchsiaResourceDialect>
        for &mut Present2Args
    {
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<Present2Args>(offset);
            // Vector header
            let max_ordinal: u64 = self.max_ordinal_present();
            encoder.write_num(max_ordinal, offset);
            encoder.write_num(fidl::encoding::ALLOC_PRESENT_U64, offset + 8);
            // Calling encoder.out_of_line_offset(0) is not allowed.
            if max_ordinal == 0 {
                return Ok(());
            }
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = max_ordinal as usize * envelope_size;
            #[allow(unused_variables)]
            let offset = encoder.out_of_line_offset(bytes_len);
            let mut _prev_end_offset: usize = 0;
            if 1 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (1 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                i64,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.requested_presentation_time
                    .as_ref()
                    .map(<i64 as fidl::encoding::ValueTypeMarker>::borrow),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 2 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (2 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                fidl::encoding::UnboundedVector<
                    fidl::encoding::HandleType<
                        fidl::Event,
                        { fidl::ObjectType::EVENT.into_raw() },
                        2147483648,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.acquire_fences.as_mut().map(
                    <fidl::encoding::UnboundedVector<
                        fidl::encoding::HandleType<
                            fidl::Event,
                            { fidl::ObjectType::EVENT.into_raw() },
                            2147483648,
                        >,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow,
                ),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 3 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (3 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                fidl::encoding::UnboundedVector<
                    fidl::encoding::HandleType<
                        fidl::Event,
                        { fidl::ObjectType::EVENT.into_raw() },
                        2147483648,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.release_fences.as_mut().map(
                    <fidl::encoding::UnboundedVector<
                        fidl::encoding::HandleType<
                            fidl::Event,
                            { fidl::ObjectType::EVENT.into_raw() },
                            2147483648,
                        >,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow,
                ),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 4 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (4 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                i64,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.requested_prediction_span
                    .as_ref()
                    .map(<i64 as fidl::encoding::ValueTypeMarker>::borrow),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;

            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect> for Present2Args {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::default()
        }

        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let len = match fidl::encoding::decode_vector_header(decoder, offset)? {
                None => return Err(fidl::Error::NotNullable),
                Some(len) => len,
            };
            // Calling decoder.out_of_line_offset(0) is not allowed.
            if len == 0 {
                return Ok(());
            };
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = len * envelope_size;
            let offset = decoder.out_of_line_offset(bytes_len)?;
            // Decode the envelope for each type.
            let mut _next_ordinal_to_read = 0;
            let mut next_offset = offset;
            let end_offset = offset + bytes_len;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 1 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size =
                    <i64 as fidl::encoding::TypeMarker>::inline_size(decoder.context);
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.requested_presentation_time.get_or_insert_with(|| {
                    fidl::new_empty!(i64, fidl::encoding::DefaultFuchsiaResourceDialect)
                });
                fidl::decode!(
                    i64,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 2 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::UnboundedVector<
                    fidl::encoding::HandleType<
                        fidl::Event,
                        { fidl::ObjectType::EVENT.into_raw() },
                        2147483648,
                    >,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.acquire_fences.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::UnboundedVector<
                            fidl::encoding::HandleType<
                                fidl::Event,
                                { fidl::ObjectType::EVENT.into_raw() },
                                2147483648,
                            >,
                        >,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::UnboundedVector<
                        fidl::encoding::HandleType<
                            fidl::Event,
                            { fidl::ObjectType::EVENT.into_raw() },
                            2147483648,
                        >,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 3 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::UnboundedVector<
                    fidl::encoding::HandleType<
                        fidl::Event,
                        { fidl::ObjectType::EVENT.into_raw() },
                        2147483648,
                    >,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.release_fences.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::UnboundedVector<
                            fidl::encoding::HandleType<
                                fidl::Event,
                                { fidl::ObjectType::EVENT.into_raw() },
                                2147483648,
                            >,
                        >,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::UnboundedVector<
                        fidl::encoding::HandleType<
                            fidl::Event,
                            { fidl::ObjectType::EVENT.into_raw() },
                            2147483648,
                        >,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 4 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size =
                    <i64 as fidl::encoding::TypeMarker>::inline_size(decoder.context);
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.requested_prediction_span.get_or_insert_with(|| {
                    fidl::new_empty!(i64, fidl::encoding::DefaultFuchsiaResourceDialect)
                });
                fidl::decode!(
                    i64,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;

            // Decode the remaining unknown envelopes.
            while next_offset < end_offset {
                _next_ordinal_to_read += 1;
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                next_offset += envelope_size;
            }

            Ok(())
        }
    }

    impl SessionEndpoints {
        #[inline(always)]
        fn max_ordinal_present(&self) -> u64 {
            if let Some(_) = self.mouse_source {
                return 6;
            }
            if let Some(_) = self.touch_source {
                return 5;
            }
            if let Some(_) = self.view_ref_focused {
                return 4;
            }
            if let Some(_) = self.view_focuser {
                return 3;
            }
            if let Some(_) = self.session_listener {
                return 2;
            }
            if let Some(_) = self.session {
                return 1;
            }
            0
        }
    }

    impl fidl::encoding::ResourceTypeMarker for SessionEndpoints {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for SessionEndpoints {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl
        fidl::encoding::Encode<SessionEndpoints, fidl::encoding::DefaultFuchsiaResourceDialect>
        for &mut SessionEndpoints
    {
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<SessionEndpoints>(offset);
            // Vector header
            let max_ordinal: u64 = self.max_ordinal_present();
            encoder.write_num(max_ordinal, offset);
            encoder.write_num(fidl::encoding::ALLOC_PRESENT_U64, offset + 8);
            // Calling encoder.out_of_line_offset(0) is not allowed.
            if max_ordinal == 0 {
                return Ok(());
            }
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = max_ordinal as usize * envelope_size;
            #[allow(unused_variables)]
            let offset = encoder.out_of_line_offset(bytes_len);
            let mut _prev_end_offset: usize = 0;
            if 1 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (1 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>, fidl::encoding::DefaultFuchsiaResourceDialect>(
            self.session.as_mut().map(<fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>> as fidl::encoding::ResourceTypeMarker>::take_or_borrow),
            encoder, offset + cur_offset, depth
        )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 2 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (2 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>, fidl::encoding::DefaultFuchsiaResourceDialect>(
            self.session_listener.as_mut().map(<fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>> as fidl::encoding::ResourceTypeMarker>::take_or_borrow),
            encoder, offset + cur_offset, depth
        )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 3 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (3 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.view_focuser.as_mut().map(
                    <fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow,
                ),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 4 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (4 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::ViewRefFocusedMarker>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.view_ref_focused.as_mut().map(
                    <fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::ViewRefFocusedMarker>,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow,
                ),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 5 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (5 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::TouchSourceMarker>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.touch_source.as_mut().map(
                    <fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::TouchSourceMarker>,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow,
                ),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 6 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (6 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::MouseSourceMarker>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.mouse_source.as_mut().map(
                    <fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::MouseSourceMarker>,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow,
                ),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;

            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for SessionEndpoints
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::default()
        }

        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let len = match fidl::encoding::decode_vector_header(decoder, offset)? {
                None => return Err(fidl::Error::NotNullable),
                Some(len) => len,
            };
            // Calling decoder.out_of_line_offset(0) is not allowed.
            if len == 0 {
                return Ok(());
            };
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = len * envelope_size;
            let offset = decoder.out_of_line_offset(bytes_len)?;
            // Decode the envelope for each type.
            let mut _next_ordinal_to_read = 0;
            let mut next_offset = offset;
            let end_offset = offset + bytes_len;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 1 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<SessionMarker>,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.session.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::Endpoint<fidl::endpoints::ServerEnd<SessionMarker>>,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 2 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::Endpoint<
                    fidl::endpoints::ClientEnd<SessionListenerMarker>,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.session_listener.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::Endpoint<fidl::endpoints::ClientEnd<SessionListenerMarker>>,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 3 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.view_focuser.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::Endpoint<
                            fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>,
                        >,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::FocuserMarker>,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 4 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::ViewRefFocusedMarker>,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.view_ref_focused.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::Endpoint<
                            fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::ViewRefFocusedMarker>,
                        >,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_views::ViewRefFocusedMarker>,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 5 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::TouchSourceMarker>,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.touch_source.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::Endpoint<
                            fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::TouchSourceMarker>,
                        >,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::TouchSourceMarker>,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 6 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::MouseSourceMarker>,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.mouse_source.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::Endpoint<
                            fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::MouseSourceMarker>,
                        >,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_pointer::MouseSourceMarker>,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;

            // Decode the remaining unknown envelopes.
            while next_offset < end_offset {
                _next_ordinal_to_read += 1;
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                next_offset += envelope_size;
            }

            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for Command {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for Command {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl fidl::encoding::Encode<Command, fidl::encoding::DefaultFuchsiaResourceDialect>
        for &mut Command
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<Command>(offset);
            encoder.write_num::<u64>(self.ordinal(), offset);
            match self {
            Command::Gfx(ref mut val) => {
                fidl::encoding::encode_in_envelope::<fidl_fuchsia_ui_gfx::Command, fidl::encoding::DefaultFuchsiaResourceDialect>(
                    <fidl_fuchsia_ui_gfx::Command as fidl::encoding::ResourceTypeMarker>::take_or_borrow(val),
                    encoder, offset + 8, _depth
                )
            }
            Command::Views(ref val) => {
                fidl::encoding::encode_in_envelope::<fidl_fuchsia_ui_views::Command, fidl::encoding::DefaultFuchsiaResourceDialect>(
                    <fidl_fuchsia_ui_views::Command as fidl::encoding::ValueTypeMarker>::borrow(val),
                    encoder, offset + 8, _depth
                )
            }
            Command::Input(ref val) => {
                fidl::encoding::encode_in_envelope::<fidl_fuchsia_ui_input::Command, fidl::encoding::DefaultFuchsiaResourceDialect>(
                    <fidl_fuchsia_ui_input::Command as fidl::encoding::ValueTypeMarker>::borrow(val),
                    encoder, offset + 8, _depth
                )
            }
        }
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect> for Command {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::Gfx(fidl::new_empty!(
                fidl_fuchsia_ui_gfx::Command,
                fidl::encoding::DefaultFuchsiaResourceDialect
            ))
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            #[allow(unused_variables)]
            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            let (ordinal, inlined, num_bytes, num_handles) =
                fidl::encoding::decode_union_inline_portion(decoder, offset)?;

            let member_inline_size = match ordinal {
                1 => <fidl_fuchsia_ui_gfx::Command as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context,
                ),
                3 => <fidl_fuchsia_ui_views::Command as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context,
                ),
                4 => <fidl_fuchsia_ui_input::Command as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context,
                ),
                _ => return Err(fidl::Error::UnknownUnionTag),
            };

            if inlined != (member_inline_size <= 4) {
                return Err(fidl::Error::InvalidInlineBitInEnvelope);
            }
            let _inner_offset;
            if inlined {
                decoder.check_inline_envelope_padding(offset + 8, member_inline_size)?;
                _inner_offset = offset + 8;
            } else {
                depth.increment()?;
                _inner_offset = decoder.out_of_line_offset(member_inline_size)?;
            }
            match ordinal {
                1 => {
                    #[allow(irrefutable_let_patterns)]
                    if let Command::Gfx(_) = self {
                        // Do nothing, read the value into the object
                    } else {
                        // Initialize `self` to the right variant
                        *self = Command::Gfx(fidl::new_empty!(
                            fidl_fuchsia_ui_gfx::Command,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        ));
                    }
                    #[allow(irrefutable_let_patterns)]
                    if let Command::Gfx(ref mut val) = self {
                        fidl::decode!(
                            fidl_fuchsia_ui_gfx::Command,
                            fidl::encoding::DefaultFuchsiaResourceDialect,
                            val,
                            decoder,
                            _inner_offset,
                            depth
                        )?;
                    } else {
                        unreachable!()
                    }
                }
                3 => {
                    #[allow(irrefutable_let_patterns)]
                    if let Command::Views(_) = self {
                        // Do nothing, read the value into the object
                    } else {
                        // Initialize `self` to the right variant
                        *self = Command::Views(fidl::new_empty!(
                            fidl_fuchsia_ui_views::Command,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        ));
                    }
                    #[allow(irrefutable_let_patterns)]
                    if let Command::Views(ref mut val) = self {
                        fidl::decode!(
                            fidl_fuchsia_ui_views::Command,
                            fidl::encoding::DefaultFuchsiaResourceDialect,
                            val,
                            decoder,
                            _inner_offset,
                            depth
                        )?;
                    } else {
                        unreachable!()
                    }
                }
                4 => {
                    #[allow(irrefutable_let_patterns)]
                    if let Command::Input(_) = self {
                        // Do nothing, read the value into the object
                    } else {
                        // Initialize `self` to the right variant
                        *self = Command::Input(fidl::new_empty!(
                            fidl_fuchsia_ui_input::Command,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        ));
                    }
                    #[allow(irrefutable_let_patterns)]
                    if let Command::Input(ref mut val) = self {
                        fidl::decode!(
                            fidl_fuchsia_ui_input::Command,
                            fidl::encoding::DefaultFuchsiaResourceDialect,
                            val,
                            decoder,
                            _inner_offset,
                            depth
                        )?;
                    } else {
                        unreachable!()
                    }
                }
                ordinal => panic!("unexpected ordinal {:?}", ordinal),
            }
            if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize) {
                return Err(fidl::Error::InvalidNumBytesInEnvelope);
            }
            if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                return Err(fidl::Error::InvalidNumHandlesInEnvelope);
            }
            Ok(())
        }
    }

    impl fidl::encoding::ResourceTypeMarker for Event {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for Event {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl fidl::encoding::Encode<Event, fidl::encoding::DefaultFuchsiaResourceDialect>
        for &mut Event
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<Event>(offset);
            encoder.write_num::<u64>(self.ordinal(), offset);
            match self {
                Event::Gfx(ref val) => fidl::encoding::encode_in_envelope::<
                    fidl_fuchsia_ui_gfx::Event,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                >(
                    <fidl_fuchsia_ui_gfx::Event as fidl::encoding::ValueTypeMarker>::borrow(val),
                    encoder,
                    offset + 8,
                    _depth,
                ),
                Event::Input(ref val) => fidl::encoding::encode_in_envelope::<
                    fidl_fuchsia_ui_input::InputEvent,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                >(
                    <fidl_fuchsia_ui_input::InputEvent as fidl::encoding::ValueTypeMarker>::borrow(
                        val,
                    ),
                    encoder,
                    offset + 8,
                    _depth,
                ),
                Event::Unhandled(ref mut val) => fidl::encoding::encode_in_envelope::<
                    Command,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                >(
                    <Command as fidl::encoding::ResourceTypeMarker>::take_or_borrow(val),
                    encoder,
                    offset + 8,
                    _depth,
                ),
            }
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect> for Event {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::Gfx(fidl::new_empty!(
                fidl_fuchsia_ui_gfx::Event,
                fidl::encoding::DefaultFuchsiaResourceDialect
            ))
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            #[allow(unused_variables)]
            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            let (ordinal, inlined, num_bytes, num_handles) =
                fidl::encoding::decode_union_inline_portion(decoder, offset)?;

            let member_inline_size = match ordinal {
                1 => <fidl_fuchsia_ui_gfx::Event as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context,
                ),
                2 => {
                    <fidl_fuchsia_ui_input::InputEvent as fidl::encoding::TypeMarker>::inline_size(
                        decoder.context,
                    )
                }
                3 => <Command as fidl::encoding::TypeMarker>::inline_size(decoder.context),
                _ => return Err(fidl::Error::UnknownUnionTag),
            };

            if inlined != (member_inline_size <= 4) {
                return Err(fidl::Error::InvalidInlineBitInEnvelope);
            }
            let _inner_offset;
            if inlined {
                decoder.check_inline_envelope_padding(offset + 8, member_inline_size)?;
                _inner_offset = offset + 8;
            } else {
                depth.increment()?;
                _inner_offset = decoder.out_of_line_offset(member_inline_size)?;
            }
            match ordinal {
                1 => {
                    #[allow(irrefutable_let_patterns)]
                    if let Event::Gfx(_) = self {
                        // Do nothing, read the value into the object
                    } else {
                        // Initialize `self` to the right variant
                        *self = Event::Gfx(fidl::new_empty!(
                            fidl_fuchsia_ui_gfx::Event,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        ));
                    }
                    #[allow(irrefutable_let_patterns)]
                    if let Event::Gfx(ref mut val) = self {
                        fidl::decode!(
                            fidl_fuchsia_ui_gfx::Event,
                            fidl::encoding::DefaultFuchsiaResourceDialect,
                            val,
                            decoder,
                            _inner_offset,
                            depth
                        )?;
                    } else {
                        unreachable!()
                    }
                }
                2 => {
                    #[allow(irrefutable_let_patterns)]
                    if let Event::Input(_) = self {
                        // Do nothing, read the value into the object
                    } else {
                        // Initialize `self` to the right variant
                        *self = Event::Input(fidl::new_empty!(
                            fidl_fuchsia_ui_input::InputEvent,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        ));
                    }
                    #[allow(irrefutable_let_patterns)]
                    if let Event::Input(ref mut val) = self {
                        fidl::decode!(
                            fidl_fuchsia_ui_input::InputEvent,
                            fidl::encoding::DefaultFuchsiaResourceDialect,
                            val,
                            decoder,
                            _inner_offset,
                            depth
                        )?;
                    } else {
                        unreachable!()
                    }
                }
                3 => {
                    #[allow(irrefutable_let_patterns)]
                    if let Event::Unhandled(_) = self {
                        // Do nothing, read the value into the object
                    } else {
                        // Initialize `self` to the right variant
                        *self = Event::Unhandled(fidl::new_empty!(
                            Command,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        ));
                    }
                    #[allow(irrefutable_let_patterns)]
                    if let Event::Unhandled(ref mut val) = self {
                        fidl::decode!(
                            Command,
                            fidl::encoding::DefaultFuchsiaResourceDialect,
                            val,
                            decoder,
                            _inner_offset,
                            depth
                        )?;
                    } else {
                        unreachable!()
                    }
                }
                ordinal => panic!("unexpected ordinal {:?}", ordinal),
            }
            if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize) {
                return Err(fidl::Error::InvalidNumBytesInEnvelope);
            }
            if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                return Err(fidl::Error::InvalidNumHandlesInEnvelope);
            }
            Ok(())
        }
    }
}