rem: propValue.getTopLevelWidget().add(this._popup); 
add: var p = propValue.getTopLevelWidget(); if (p) { p.add(this._popup); }; 
context: proto._modifyParent = function(propValue, propOldValue, propName, uniqModIds){  if (propValue)  {    propValue.getTopLevelWidget().add(this._popup);  }  else if (propOldValue)  {    propOldValue.getTopLevelWidget().remove(this._popup);  };    return QxWidget.prototype._modifyParent.call(this, propValue, propOldValue, propName, uniqModIds);};
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/07a3f6f3643eaa513bd192b28668b5bbe563671a/QxComboBox.js/clean/qooxdoo/source/script/widgets/QxComboBox.js