How to dispose bloc when using Inherited Widget?

I have made a simple app using bloc and InheritedWidget. Following is the code

class Bloc {

  final StreamController<bool> _changeColor = PublishSubject<bool>();

  Function(bool) get changeColour => _changeColor.sink.add;

  Stream<bool> get colour => _changeColor.stream;

  void dispose(){
    _changeColor.close();
  }

}


class Provider extends InheritedWidget {

  final bloc = Bloc();
  Provider({Key key,Widget child}): super(key: key,child: child);

  @override
  bool updateShouldNotify(InheritedWidget oldWidget) {
    return true;
  }

  static Bloc of(BuildContext context){
    return (context.inheritFromWidgetOfExactType(Provider) as Provider).bloc;
  }


void dispose(){
    bloc?.dispose();
  }
}


class _HomePageState extends State<HomePage> {

  var bloc;

  @override
  void initState() {
    super.initState();
    bloc = Provider.of(context);
  }

  @override
  Widget build(BuildContext context) {

    return Column(
      children: <Widget>[
        RaisedButton(
          onPressed: () {
            bloc.changeColour(true);
          },
          child: Text("Change colour"),
        ),
        StreamBuilder(
          builder: (context, snapshot) {

            var bool = snapshot?.data ?? false;

            return Text(
              "First text",
              style:
              TextStyle(color: bool ? Colors.red : Colors.green),
            );
          },
          stream: bloc?.colour,
        ),
      ],
    );
  }


  @override
  void dispose() {
    super.dispose();
  }

}

I don't understand how to call dispose method of the bloc when using InheritedWidget. Of course I can create a global variable of bloc and avoid using InheritedWidget to dispose the bloc using the dispose method which is present in the bloc but I really want to use InheritedWidget.

Does using the PublishSubject from rxdart disposes the streamcontroller automatically, is it life cycle aware, I couldn't find anything related to this in the documentation. Is there any debugging process to make sure the streamcontroller is disposed off correctly?

That is not possible using Inheritedwidget. The widget is not made to handle data, but to share it.

You have to wrap your Inheritedwidget into a StatefulWidget and use the dispose of the latter