 
     /**
      *  Not Supported in Tree.
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 9
+     *  @playerversion AIR 1.1
+     *  @productversion Flex 3
      */
     public function get filterFunction():Function
     {

	/**
	 *  Returns the parent of a node.  Top level node's parent is null
	 *  If we don't know the parent we return undefined.
	 */
    public function getParentItem(node:Object):*
    {


    /**
     *  Checks the collection for item using standard equality test.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 9
     *  @playerversion AIR 1.1
     *  @productversion Flex 3
     */
    public function contains(item:Object):Boolean
	{
