inhrited_notifier.dart

class HairColorNotifier extends ValueNotifier<int> {
  HairColorNotifier(int value1) : super(value1);

}

class HairColorInheritedWidget extends InheritedNotifier<HairColorNotifier> {
  HairColorInheritedWidget(
      {Key? key, required Widget child, required HairColorNotifier notifier})
      : super(key: key, child: child, notifier: notifier);

  static HairColorNotifier of(BuildContext context) {
    return context
        .dependOnInheritedWidgetOfExactType<HairColorInheritedWidget>()!
        .notifier!;
  }
}