rem: this._icon.setSource(propValue ? propValue : (new QxImageManager).getBlank()); 
add: var o = this._icon;  if (this._updateUseIcon()) { if (o) { o.setSource(propValue); o.setParent(this._captionbar); } else { this._pureCreateFillIcon(); }; } else if (o) { o.setParent(null); o.setSource(propValue); };  this._layoutCaption();  
context: proto._modifyIcon = function(propValue, propOldValue, propName, uniqModIds){  this._icon.setSource(propValue ? propValue : (new QxImageManager).getBlank());    return true;};
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/8de59892375070cf92a7714e804ffa08bf617962/QxWindow.js/buggy/qooxdoo/source/script/widgets/QxWindow.js