 import mx.collections.XMLListCollection;
 import mx.collections.errors.ItemPendingError;
 import mx.core.EventPriority;
+import mx.core.mx_internal;
 import mx.events.CollectionEvent;
 import mx.events.CollectionEventKind;
 import mx.events.PropertyChangeEvent;
 import mx.utils.IXMLNotifiable;
 import mx.utils.XMLNotifier;
+
+use namespace mx_internal;
 
 [ExcludeClass]
 

		if (event is CollectionEvent)
        {
            var ce:CollectionEvent = CollectionEvent(event);
            if (ce.kind == CollectionEventKind.mx_internal::EXPAND)
            {
            	event.stopImmediatePropagation();
            }

							children = treeData as XMLListCollection;
							if (parentNode)
							{
								children.dispatchResetEvent = false;
								children.source = parentNode.*;
							}
						}
