How to use the aioesphomeapi.api_pb2.FanCommandRequest function in aioesphomeapi

16: pb.ListEntitiesSensorResponse,
    17: pb.ListEntitiesSwitchResponse,
    18: pb.ListEntitiesTextSensorResponse,
    19: pb.ListEntitiesDoneResponse,
    20: pb.SubscribeStatesRequest,
    21: pb.BinarySensorStateResponse,
    22: pb.CoverStateResponse,
    23: pb.FanStateResponse,
    24: pb.LightStateResponse,
    25: pb.SensorStateResponse,
    26: pb.SwitchStateResponse,
    27: pb.TextSensorStateResponse,
    28: pb.SubscribeLogsRequest,
    29: pb.SubscribeLogsResponse,
    30: pb.CoverCommandRequest,
    31: pb.FanCommandRequest,
    32: pb.LightCommandRequest,
    33: pb.SwitchCommandRequest,
    34: pb.SubscribeHomeassistantServicesRequest,
    35: pb.HomeassistantServiceResponse,
    36: pb.GetTimeRequest,
    37: pb.GetTimeResponse,
    38: pb.SubscribeHomeAssistantStatesRequest,
    39: pb.SubscribeHomeAssistantStateResponse,
    40: pb.HomeAssistantStateResponse,
    41: pb.ListEntitiesServicesResponse,
    42: pb.ExecuteServiceRequest,
    43: pb.ListEntitiesCameraResponse,
    44: pb.CameraImageResponse,
    45: pb.CameraImageRequest,
    46: pb.ListEntitiesClimateResponse,
    47: pb.ClimateStateResponse,

async def fan_command(self,
                          key: int,
                          state: Optional[bool] = None,
                          speed: Optional[FanSpeed] = None,
                          oscillating: Optional[bool] = None
                          ) -> None:
        self._check_authenticated()

        req = pb.FanCommandRequest()
        req.key = key
        if state is not None:
            req.has_state = True
            req.state = state
        if speed is not None:
            req.has_speed = True
            req.speed = speed
        if oscillating is not None:
            req.has_oscillating = True
            req.oscillating = oscillating
        await self._connection.send_message(req)