rem: var data = DNDUtils.getData("OutlinerBuilder/column-remove", 0); 
add: var data = DNDUtils.getData("TreeBuilder/column-remove", 0); 
context:   onDragDropIn: function(aEvent)  {    var data = DNDUtils.getData("OutlinerBuilder/column-remove", 0);    var string = XPCU.QI(data, "nsISupportsWString");    this.addItem(string.data);  },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/d38a0937d9c93a0a9d913e2ac781e4328bb8cc73/columnsDialog.js/buggy/extensions/inspector/resources/content/viewers/dom/columnsDialog.js