                 }
             }
         }
-        return true;
     }
     
     /**

     *  Called in response to one or more items having been removed from the 
     *  grid's dataProvider.  
     */
    private function dataProviderCollectionRemove(event:CollectionEvent):Boolean
    {
        const eventItemsLength:uint = event.items.length;
        const firstRemoveIndex:int = event.location;

     *  to see if the item is visible and invalidates the grid if it is. Otherwise, 
     *  do nothing.
     */
    private function dataProviderCollectionUpdate(event:CollectionEvent):void
    {
        var data:Object;
        const itemsLength:int = event.items.length;
