MPScaffold(
    name: 'ListView',
    backgroundColor: Color.fromARGB(255, 236, 236, 236),
    body: MPRefreshIndicator(
    onRefresh: (key) async {
        print('start refresh');
        await Future.delayed(Duration(seconds: 5));
        print('end refresh');
    },
    enableChecker: (key) {
        return key is ValueKey && key.value == 'main';
    },
    child: ListView(
            key: Key('main'),
            children: []
        ),
    ),
);