      */
     mx_internal function insertChildItems(subdirectory:File, childItems:Array):void
     {
-    	var childCollection:ArrayCollection = new ArrayCollection(childItems);
-    	
+        var childCollection:ArrayCollection = new ArrayCollection(childItems);
+        
         childCollection.filterFunction =
-        	helper.directoryEnumeration.fileFilterFunction;
+            helper.directoryEnumeration.fileFilterFunction;
         childCollection.sort = new Sort();
         childCollection.sort.compareFunction =
-        	helper.directoryEnumeration.fileCompareFunction;
+            helper.directoryEnumeration.fileCompareFunction;
         childCollection.refresh();
 
         FileSystemTreeDataDescriptor(dataDescriptor).setChildren(
-        	subdirectory, childCollection);
+            subdirectory, childCollection);
 
         expandItem(subdirectory, true, true);
 

        super.measure();

       var text:String = resourceManager.getString(
        	"aircontrols", "fileSystemTree_measuredText");
        measuredWidth = measureText(text).width;
    }


        return !event.isDefaultPrevented();
    }

    /**
     *  @private
     *  Dispatches a cancelable "directoryClosing" event
     *  and returns true if it wasn't canceled.
     */
    private function dispatchDirectoryClosingEvent(directory:File):Boolean
    {
        var event:FileEvent =
