public void UnsubscribeToNumberChanges(INumberObserver observer) { _board.RemoveNumberObserver(observer); }
/* Subscriptions */ public void SubscribeToNumberChanges(INumberObserver observer) { _board.AddNumberObserver(observer); }
public void RemoveNumberObserver(INumberObserver observer) { _numberObservers.Remove(observer); }
/* INumberObservable */ public void AddNumberObserver(INumberObserver observer) { _numberObservers.Add(observer); }