// Flutter code sample for {{element}} // {{description}} {{code-dartImports}} import 'package:flutter/material.dart'; {{code-imports}} void main() => runApp(const MyApp()); /// This is the main application widget. class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); static const String _title = 'Flutter Code Sample'; @override Widget build(BuildContext context) { return const MaterialApp( restorationScopeId: 'app', title: _title, home: MyStatefulWidget(restorationId: 'main'), ); } } {{code-preamble}} /// This is the stateful widget that the main application instantiates. class MyStatefulWidget extends StatefulWidget { const MyStatefulWidget({Key? key, this.restorationId}) : super(key: key); final String? restorationId; @override State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); } /// This is the private State class that goes with MyStatefulWidget. /// RestorationProperty objects can be used because of RestorationMixin. class _MyStatefulWidgetState extends State<MyStatefulWidget> with RestorationMixin { // In this example, the restoration ID for the mixin is passed in through // the [StatefulWidget]'s constructor. @override String? get restorationId => widget.restorationId; {{code}} }