rem: onAssert: function (aDS, aSource, aProperty, aValue) 
add: onAssert: function (aDS, aSource, aProperty, aValue) 
context:   onAssert: function (aDS, aSource, aProperty, aValue)   {    try {      var value = aValue.QueryInterface(Components.interfaces.nsIRDFResource);      if (aDS.URI == "rdf:bookmarks" && aProperty.Value == RDF_NS + "type" &&           value.Value == NC_NS + "Folder")        this._newFolderURI = aSource.Value;    }    catch (e) {      // Failures are OK, the value could be a literal instead of a resource.    }  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/0b2dd2b2d2fd037df917e07645fa019a963332a5/bookmarksTree.js/buggy/xpfe/components/bookmarks/resources/bookmarksTree.js