rem: this.rdf = Components.classes[RDF_PROGID].getService(nsIRDFService); 
add: this.rdf = Components.classes[RDF_CONTRACTID].getService(nsIRDFService); 
context: function nsSidebar(){    const RDF_PROGID = "component://netscape/rdf/rdf-service";    const nsIRDFService = Components.interfaces.nsIRDFService;        this.rdf = Components.classes[RDF_PROGID].getService(nsIRDFService);    this.datasource_uri = getSidebarDatasourceURI(PANELS_RDF_FILE);    debug('datasource_uri is ' + this.datasource_uri);    this.resource = 'urn:sidebar:current-panel-list';    this.datasource = this.rdf.GetDataSource(this.datasource_uri);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/0257791053c2b38e1dfaf2ee11afae973e82e394/nsSidebar.js/clean/xpfe/components/sidebar/src/nsSidebar.js