import 'package:flutter/material.dart'; class UxApp extends InheritedWidget { final Widget child; UxApp({this.child}); Widget build(BuildContext context) { return Stack( children: [Positioned.fill(child: child)], ); } bool updateShouldNotify(InheritedWidget oldWidget) => false; UxApp of(BuildContext context) => context.dependOnInheritedWidgetOfExactType(); }