rem: return this.getProperty(aResource, NC_NS+"FolderGroup") == "true" 
add: return this.getProperty(aResource, NC_NS+"FolderGroup") == "true"; 
context:   isFolderGroup: function (aResource) {    return this.getProperty(aResource, NC_NS+"FolderGroup") == "true"  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/a7b5ad78b104247b5a5b41558eae522fbba57bdc/bookmarks.js/clean/xpfe/components/bookmarks/resources/bookmarks.js