public void DetachSubscriber(INewsPaperSubscriber subscriber) { _subscribers.Remove(subscriber); }
public void AttachSubscriber(INewsPaperSubscriber subscriber) { _subscribers.Add(subscriber); }
public void DetachSubscriber(INewsPaperSubscriber subscriber) { _subscribers.Remove(subscriber); }
public void AttachSubscriber(INewsPaperSubscriber subscriber) { _subscribers.Add(subscriber); }