Fungus.Draggable2D.UnregisterHandler C# (CSharp) Method

        public void UnregisterHandler(DragCompleted handler)
        {
            if(dragCompletedHandlers.Contains(handler))
            {
                dragCompletedHandlers.Remove(handler);
            }
        }
        #endregion

        protected virtual void OnDisable()
        {
            eventDispatcher.RemoveListener <DragCompletedEvent>(OnDragCompletedEvent);
            eventDispatcher.RemoveListener <DragEntered.DragEnteredEvent>(OnDragEnteredEvent);
            eventDispatcher.RemoveListener <DragExited.DragExitedEvent>(OnDragExitedEvent);

            if (draggableObject != null)
            {
                draggableObject.UnregisterHandler(this);
            }

            eventDispatcher = null;
        }