如何在flutter中将provider设置为只有一种类型的数据？

dependencies:
  flutter:
    sdk: flutter
  provider: ^5.0.0

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

class MyData {
  String name;
  int age;

  MyData({required this.name, required this.age});
}

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider(
      create: (context) => MyData(name: 'John', age: 25),
      child: MaterialApp(
        title: 'Flutter Provider Example',
        home: HomePage(),
      ),
    );
  }
}

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final myData = Provider.of<MyData>(context);

    return Scaffold(
      appBar: AppBar(
        title: Text('Home'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text('Name: ${myData.name}'),
            Text('Age: ${myData.age}'),
          ],
        ),
      ),
    );
  }
}