public override void HandleLinesRemove(LinesRemovedMessage message) {
            linesCount -= message.Count;

            while (message.Count > 0) { 
                Pop();

                message.Count--;
            }

            UpdateSize();
        }
 public abstract void HandleLinesRemove(LinesRemovedMessage message);
 public override void HandleLinesRemove(LinesRemovedMessage message) {
     
 }