Module sl4f_types 
Source - AsyncCommandRequest
 - Represents a RPC command request to be fulfilled by the FIDL event loop
 - AsyncResponse
 - Represents a RPC response from the FIDL event loop to the RPC request side
 - ClientData
 - Information about each client that has connected
 - CommandRequest
 - Required fields for making a request
 - CommandResponse
 - Return packet after SL4F runs command
 - MethodId
 - The parsed 
method field from an incoming json-rpc request. - MethodIdParseError
 - RequestId
 - The parsed 
id field from an incoming json-rpc request. 
- AsyncRequest
 - Represents a RPC request to be fulfilled by the FIDL event loop
 
- Facade
 - An Sl4f facade that can handle incoming requests.