在flutter中的一个屏幕中的选项卡之间共享数据？

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: DefaultTabController(
        length: 2,
        child: Scaffold(
          appBar: AppBar(
            bottom: TabBar(
              tabs: [
                Tab(icon: Icon(Icons.directions_car)),
                Tab(icon: Icon(Icons.directions_transit)),
              ],
            ),
          ),
          body: TabBarView(
            children: [
              CarTab(),
              TransitTab(),
            ],
          ),
        ),
      ),
    );
  }
}

class SharedData extends InheritedWidget {
  final String data;

  SharedData({
    required this.data,
    required Widget child,
  }) : super(child: child);

  static SharedData of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<SharedData>()!;
  }

  @override
  bool updateShouldNotify(SharedData oldWidget) => oldWidget.data != data;
}

class CarTab extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SharedData(
      data: "Car Data",
      child: Center(
        child: Text(SharedData.of(context).data),
      ),
    );
  }
}

class TransitTab extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SharedData(
      data: "Transit Data",
      child: Center(
        child: Text(SharedData.of(context).data),
      ),
    );
  }
}