有没有办法从FutureBuilder中提取数据？

Future<String> fetchData() async {
  // 模拟异步操作，比如从服务器获取数据
  await Future.delayed(Duration(seconds: 2));
  return 'Hello, World!';
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FutureBuilder<String>(
      future: fetchData(),
      builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) {
          // 当Future未完成时显示的UI
          return CircularProgressIndicator();
        } else if (snapshot.hasError) {
          // 当Future发生错误时显示的UI
          return Text('Error: ${snapshot.error}');
        } else {
          // 当Future完成时显示的UI，并提取数据
          final data = snapshot.data;
          return Text('Data: $data');
        }
      },
    );
  }
}