stateful_implementation.dart

class AppState extends State<App>{  
  Widget build(BuildContext context){
    return Scaffold(
      appBar: AppBar(
        title: Text("First Empty Half Baked App"),
      ),
      body: ReorderableListView(
        children: <Widget>[
          for(final value in items)
            Text(
              value,
              key: Key(value),
              style: TextStyle(
                fontSize: 22.0
              ),
              )
        ],
        onReorder: (OldIndex, NewIndex){

        },
      ),
    );
  }
}