import 'dart:async'; import 'package:bloc/bloc.dart'; import 'package:meta/meta.dart'; part 'history_event.dart'; part 'history_state.dart'; class HistoryBloc extends Bloc { HistoryBloc() : super(HistoryInitial()); @override Stream mapEventToState( HistoryEvent event, ) async* { // TODO: implement mapEventToState } }