n(){if(this.observer){this.observer.notify();}},_query:function(matcher,node,halter){node=node||this.node;var list=[];this._queryElements(TreeApi.Logical.getChildNodes(node),matcher,halter,list);return list;},_queryElements:function(elements,matcher,halter,list){for(var i=0,l=elements.length,c;i<l&&(c=elements[i]);i++){if(c.nodeType===Node.ELEMENT_NODE){if(this._queryElement(c,matcher,halter,list)){return true;}}}},_queryElement:function(node,matcher,halter,list){var result=matcher(node);if(resu...