/// <summary>
/// Unsubscribes an existing observer of the board
/// </summary>
/// <param name="boardObserverToUnsubscribe">The observer to be unsubscribed</param>
public void Unsubscribe(IBoardObserver boardObserverToUnsubscribe) =>
this.Subscribers.Remove(boardObserverToUnsubscribe);
/// <summary>
/// Subscribes a new observer to the board
/// </summary>
/// <param name="boardObserverToSubscribe">The observer to be subscribed</param>
public void Subscribe(IBoardObserver boardObserverToSubscribe) =>
this.Subscribers.Add(boardObserverToSubscribe);
