Generic Provider

provider.dart

import 'package:flutter/material.dart';

class Provider<Value> extends InheritedWidget {
  final Value value;

  const Provider({
    Key key,
    @required Widget child,
    @required this.value,
  }) : super(key: key, child: child);

  @override
  bool updateShouldNotify(InheritedWidget _) => false;

  static Type typeOf<T>() => T;

  static T of<T>(BuildContext context) {
    final type = typeOf<Provider<T>>();
    return context.ancestorInheritedElementForWidgetOfExactType(type) as T;
  }
}