code: function() {
  		var instance = this.scraper.clone(),
  			promise = new ScraperPromise(instance);
  		promise._setPromises(this.promises);
  		promise.done(this.doneCallback);
  		promise.catch(this.errorCallback);
  		return promise;
  	}
docs: Clones the promise and the scraper.
  
  @return {!ScraperPromise} Scraper promise with an empty scraper
  clone.
  @public