flutter with translation

myhomepage.dart

class _MyHomePageState extends State<MyHomePage> {
 @override
 Widget build(BuildContext context) {
   return Scaffold(
     appBar: AppBar(
       // Replace the title line with the following:
       title: Text(AppLocalizations.of(context).hello_world),
     ),
    // The rest of the widget tree.
  );
}