qyrtpa code

abstract class Service {
  void fetchData();

  void get(){
    print('something');
  }
}

class ServiceImpl extends Service {
  @override
  void fetchData() {
    print('s');
 }
}

class ServiceGraphImpl extends Service {
  @override
  void fetchData() {
    // TODO: implement fetchData
  }

}

class Mouth {
  void speak() {
    print("qyrtpa");
  }
}


class Person {
  final Mouth service;

   Person({required this.service});

   int returnOneAndSpeak(){
    service.speak();
    return 1;
  }
}

void test() {
  
}