我想做如下所附图片中的可扩展列表视图。如何在flutter中实现这种类型的功能？

List<Item> _data = generateItems();

List<Item> generateItems() {
  return List<Item>.generate(5, (int index) {
    return Item(
      headerValue: 'Panel $index',
      expandedValue: 'This is item number $index',
    );
  });
}

class Item {
  Item({
    required this.expandedValue,
    required this.headerValue,
    this.isExpanded = false,
  });

  String expandedValue;
  String headerValue;
  bool isExpanded;
}

@override
Widget build(BuildContext context) {
  return SingleChildScrollView(
    child: Container(
      child: _buildPanel(),
    ),
  );
}

Widget _buildPanel() {
  return ExpansionPanelList(
    elevation: 1,
    expandedHeaderPadding: EdgeInsets.all(0),
    expansionCallback: (int index, bool isExpanded) {
      setState(() {
        _data[index].isExpanded = !isExpanded;
      });
    },
    children: _data.map<ExpansionPanel>((Item item) {
      return ExpansionPanel(
        headerBuilder: (BuildContext context, bool isExpanded) {
          return ListTile(
            title: Text(item.headerValue),
          );
        },
        body: ListTile(
          title: Text(item.expandedValue),
        ),
        isExpanded: item.isExpanded,
      );
    }).toList(),
  );
}

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: Text('Expansion Panel List'),
      ),
      body: MyExpansionPanelList(),
    ),
  ));
}