add: this._arrowObject._addCssClassName("QxMenuButtonArrow"); 
context: proto._pureCreateFillArrow = function(){  this._arrowObject = new QxImage();  this._arrowObject.setSource(this.getArrow());  this._arrowObject.setAnonymous(true);  this._arrowObject.setEnabled(this.isEnabled());  this._arrowObject.setParent(this);};
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/0501a0f30f2c584b11af0e02207758749640a40e/QxMenuButton.js/clean/qooxdoo/source/script/widgets/QxMenuButton.js