如何将新属性添加到flutter / dart中的列表项？

class CustomListItem extends StatelessWidget {
  final String title;
  final String subtitle;
  final String imageUrl;

  CustomListItem({
    required this.title,
    required this.subtitle,
    required this.imageUrl,
  });

  @override
  Widget build(BuildContext context) {
    return ListTile(
      leading: Image.network(imageUrl),
      title: Text(title),
      subtitle: Text(subtitle),
    );
  }
}

// 使用自定义的列表项类创建一个列表
ListView.builder(
  itemCount: items.length,
  itemBuilder: (context, index) {
    return CustomListItem(
      title: items[index].title,
      subtitle: items[index].subtitle,
      imageUrl: items[index].imageUrl,
    );
  },
);