A value of type 'StreamSink<dynamic>' can't be returned from the function 'chuckDataSink' because it has a return type of 'StreamSink<Response<chuckResponse>>?'.

[ZoraizEjaz]

Getting this issue in Flutter 2. Null Safety

[ppusapati]

This is how I resolved.

class ChuckBloc {
  ChuckRepository ? _chuckRepository;
  StreamController<Response<chuckResponse>> _chuckDataController = StreamController<Response<chuckResponse>>();
  bool ? _isStreaming;

  StreamSink<Response<chuckResponse>> get chuckDataSink =>
      _chuckDataController.sink;

  Stream<Response<chuckResponse>> get chuckDataStream =>
      _chuckDataController.stream;

  ChuckBloc(String category) {
    _chuckDataController = StreamController<Response<chuckResponse>>();
    _chuckRepository = ChuckRepository();
    _isStreaming = true;
    fetchChuckyJoke(category);
  }