如何在flutter中使用嵌套循环从rest api中获取数据？

import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  List<dynamic> data = [];

  @override
  void initState() {
    super.initState();
    fetchData();
  }

  Future<void> fetchData() async {
    final response = await http.get('https://api.example.com/data');
    if (response.statusCode == 200) {
      final jsonData = jsonDecode(response.body);
      setState(() {
        data = jsonData['data'];
      });
    } else {
      throw Exception('Failed to fetch data');
    }
  }

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: data.length,
      itemBuilder: (context, index) {
        final item = data[index];
        return ListTile(
          title: Text(item['title']),
          subtitle: Text(item['description']),
        );
      },
    );
  }
}