如何在flutter中使用injectable和get_it注入字符串？

dependencies:
  injectable: ^1.4.0
  get_it: ^7.2.0

import 'package:injectable/injectable.dart';
import 'package:get_it/get_it.dart';

final getIt = GetIt.instance;

@injectableInit
void configureDependencies() => $initGetIt(getIt);

import 'package:injectable/injectable.dart';

@lazySingleton
class MyService {
  final String myString;

  MyService(this.myString);
  
  void doSomething() {
    print(myString);
  }
}

import 'package:injectable/injectable.dart';
import 'package:my_project/services/my_service.dart';

@InjectableInit()
void configureDependencies() {
  getIt.registerLazySingleton(() => MyService(getIt<String>()));
  // 注册其他需要注入的服务类
}

import 'package:flutter/material.dart';
import 'package:my_project/injection/injection.dart';

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

import 'package:flutter/material.dart';
import 'package:get_it/get_it.dart';
import 'package:my_project/services/my_service.dart';

final getIt = GetIt.instance;

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final myService = getIt<MyService>();
    myService.doSomething();
    
    return MaterialApp(
      // ...
    );
  }
}