App Template

class WidgetsTour extends StatelessWidget{

  @override
  Widget build(BuildContext context) => MaterialApp(
    title: "Widgets",
    home: WidgetsAppHome(),
  );
}

class WidgetsAppHome extends StatelessWidget{
  @override
  Widget build(BuildContext context) => Scaffold(
    appBar: AppBar(title: Text("Widgets"),),
    body: WidgetsAppBody(),
  );
}