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private Item<T> getItem(int position, int lower, int upper)	{		Item<T> pointer;				if (position > upper || position < lower)		{			throw new IndexOutOfBoundsException();		}					if (position < size / 2)		{			pointer = start.next;			for(int i = 0; i < position; i++)			{				pointer = pointer.next;			}		}		else		{			pointer = end;			for(int i = size(); i > position; i--)			{				pointer = pointer.prev;			}		}				return pointer;	}