eNodesObserver.prototype._setup;var baseCleanup=DomApi.EffectiveNodesObserver.prototype._cleanup;Polymer.Base.mixin(DomApi.EffectiveNodesObserver.prototype,{_setup:function(){if(!this._observer){var self=this;this._mutationHandler=function(mxns){if(mxns&&mxns.length){self._scheduleNotify();}};this._observer=new MutationObserver(this._mutationHandler);this._boundFlush=function(){self._flush();};Polymer.dom.addStaticFlush(this._boundFlush);this._observer.observe(this.node,{childList:true});}
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