 
 CONFIG::performanceInstrumentation
 {
-import mx.utils.PerfUtil;
+import mx.utils.PerfUtil; 
 }
-
 
 use namespace mx_internal;
 

            invalidateDisplayListFlag = false;
        }

        // trace("<--- LayoutManager: validateDisplayList ---");
    }


    private function validateSize():void
    {
        // trace("--- LayoutManager: validateSize --->");
        CONFIG::performanceInstrumentation
        {
            var perfUtil:PerfUtil = PerfUtil.getInstance();
            perfUtil.markTime("validateSize().start");
        }

        var obj:ILayoutManagerClient = ILayoutManagerClient(invalidateSizeQueue.removeLargest());
        while (obj)
