what is mean by class, container, chile and childern in flutter app android studio
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter layout demo',
home: Scaffold(
appBar: AppBar(
title: const Text('Flutter layout demo'),
),
body: const Center(
child: Text('Hello World'),
),
),
);
}
}