Function otBorderAgentEphemeralKeyStateToString 

pub unsafe extern "C" fn otBorderAgentEphemeralKeyStateToString(
    aState: otBorderAgentEphemeralKeyState,
) -> *const c_char

Converts a given otBorderAgentEphemeralKeyState to a human-readable string.

@param[in] aState The state to convert.

@returns Human-readable string corresponding to @p aState.