Multiple Blocs Provider for Flutter

blocs_provider.dart

import 'package:flutter/material.dart';
import 'package:model/blocs/base_bloc.dart';

/// Used to give [child] and all it's subsequent children access to [blocs].
/// To get a reference to 'SomeBloc' from a child use: BlocsProvider.of<SomeBloc>(context)
class BlocsProvider extends StatefulWidget {
  BlocsProvider({Key key, @required this.child, @required this.blocs})
      : super(key: key);

  final Widget child;
  final List<BaseBloc> blocs;

  _BlocsProviderState createState() => _BlocsProviderState();

  static T of<T extends BaseBloc>(BuildContext context) {
    _InheritedBlocProvider provider = context
        .ancestorInheritedElementForWidgetOfExactType(_InheritedBlocProvider)
        .widget;
    return provider.blocs.lastWhere((bloc) => bloc is T);
  }
}

class _BlocsProviderState extends State<BlocsProvider> {
  @override
  Widget build(BuildContext context) => _InheritedBlocProvider(
        blocs: widget.blocs,
        child: widget.child,
      );

  @override
  void dispose() {
    widget.blocs.map((bloc) => bloc.dispose());
    super.dispose();
  }
}

class _InheritedBlocProvider extends InheritedWidget {
  _InheritedBlocProvider({Key key, this.child, this.blocs})
      : super(key: key, child: child);

  final Widget child;
  final List<BaseBloc> blocs;

  @override
  bool updateShouldNotify(_InheritedBlocProvider oldWidget) => false;
}