public static Task <Response <DeviceExecResponse> > OpenAsync(this SomfyExteriorBlindPositionableStatefulGeneric device, SomfyClient somfyClient) => somfyClient.Device.ExecAsync(device.Id, "open");
 public static Task <Response <DeviceExecResponse> > PositionAsync(this SomfyExteriorBlindPositionableStatefulGeneric device, SomfyClient somfyClient, int position) => somfyClient.Device.ExecAsync(device.Id, "position", new DeviceExecParameter("position", position));