*<Null safety>*
FuchsiaViewController({required int viewId, FuchsiaViewConnectionCallback? onViewConnected, FuchsiaViewConnectionCallback? onViewDisconnected, FuchsiaViewConnectionStateCallback? onViewStateChanged, FuchsiaPointerEventsCallback? onPointerEvent})
FuchsiaViewController({ required this.viewId, this.onViewConnected, this.onViewDisconnected, this.onViewStateChanged, this.onPointerEvent, }) : assert(viewId != null);