             } 
             else
             {
-            	// For destinations like ArrayCollection we don't want to 
+                // For destinations like ArrayCollection we don't want to 
                 // affect the array in-place in some cases, as ListCollectionView a
                 // attempts to compare the "before" and "after" state of the array
                 assign(dest, propertyName, new Array());

    //
    //--------------------------------------------------------------------------

	/**
	 *  Documentation is not currently available.
	 *  
	 *  @langversion 3.0
	 *  @playerversion Flash 10
	 *  @playerversion AIR 1.5
	 *  @productversion Flex 4
	 */
    public static const FIRST:String = "first";

	/**
	 *  Documentation is not currently available.
	 *  
	 *  @langversion 3.0
	 *  @playerversion Flash 10
	 *  @playerversion AIR 1.5
	 *  @productversion Flex 4
	 */
    public static const LAST:String = "last";

	/**
	 *  Documentation is not currently available.
	 *  
	 *  @langversion 3.0
	 *  @playerversion Flash 10
	 *  @playerversion AIR 1.5
	 *  @productversion Flex 4
	 */
    public static const BEFORE:String = "before";

	/**
	 *  Documentation is not currently available.
	 *  
	 *  @langversion 3.0
	 *  @playerversion Flash 10
	 *  @playerversion AIR 1.5
	 *  @productversion Flex 4
	 */
    public static const AFTER:String = "after";

    //--------------------------------------------------------------------------

     *
     *  @default "never"
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
