     public function setElementIndex(element:IVisualElement, index:int):void
     {
         // check for RangeError...this is done in addItemAt
-        // but we want to do it before removing the item
+        // but we want to do it before removing the element
         checkForRangeError(index);
         
         removeElement(element);

     */
    public function addElement(element:IVisualElement):IVisualElement
    {
        return addElementAt(element, numElements);
    }
    
    /**

        // check for RangeError:
        checkForRangeError(index, true);
        
        // This handles the case where we call addElement on something
        // that already is in the list.  Let's just handle it silently
        // and not throw up any errors.
        if (element.parent == this)
        {
            setElementIndex(element, index);
            return element;
        }
        
        // If we don't have any content yet, initialize it to an empty array
        if (_mxmlContent == null)
            _mxmlContent = [];
