if_dart_macros_could_do_more.dart

@widget Counter {
  final int initialValue;

  @state {
    int count = initialValue;
    String buttonLabel = 'Increment';
  }

  Widget build(context) {
    return Column(children: [
      Text('$greeting, ${state.count}!'),
      GestureDetector(
        onTap: () {
          state.count++;
        },
        child: Text(state.buttonLabel),
      ),
    ]);
  }
}