如何在flutter中制作另一个tabview中的tabview？

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyTabViewWidget(),
    );
  }
}

class MyTabViewWidget extends StatefulWidget {
  @override
  _MyTabViewWidgetState createState() => _MyTabViewWidgetState();
}

class _MyTabViewWidgetState extends State<MyTabViewWidget>
    with SingleTickerProviderStateMixin {
  TabController _tabController;
  int _selectedIndex = 0;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 3, vsync: this);
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 3,
      child: Scaffold(
        appBar: AppBar(
          title: Text('TabView Example'),
          bottom: TabBar(
            tabs: [
              Tab(
                text: 'Tab 1',
              ),
              Tab(
                text: 'Tab 2',
              ),
              Tab(
                text: 'Tab 3',
              ),
            ],
            controller: _tabController,
          ),
        ),
        body: TabBarView(
          children: [
            Center(
              child: Text('Tab 1 Content'),
            ),
            Center(
              child: Text('Tab 2 Content'),
            ),
            Center(
              child: Text('Tab 3 Content'),
            ),
          ],
          controller: _tabController,
        ),
      ),
    );
  }
}