      */
     public function setItemAt(item:Object, index:int):Object
     {
-    	var result:Object = removeChildAt(index);
-    	addChildAt(item as DisplayObject,index);
-    	return result;
+        var result:Object = removeChildAt(index);
+        addChildAt(item as DisplayObject,index);
+        return result;
     }
 
     /**

 *  @includeExample examples/ViewStackExample.mxml
 *
 *  @see mx.controls.LinkBar
 *  @see mx.managers.HistoryManager
 *  @see mx.managers.LayoutManager
 *  

     */
    public function getItemIndex(item:Object):int
    {
        return getChildIndex(item as DisplayObject);
    }

    /**
