code: int deleteElement(int list, int node) {
  		int prev = getPrev(node);
  		int next = getNext(node);
  		if (prev != nullNode())
  			setNext_(prev, next);
  		else
  			m_lists.setField(list, 0, next);// change head
  		if (next != nullNode())
  			setPrev_(next, prev);
  		else
  			m_lists.setField(list, 1, prev);// change tail
  
  		freeNode_(node);
  		setListSize_(list, getListSize(list) - 1);
  		return next;
  	}
docs: Deletes a node from a list. Returns the next node after the deleted one.