rem: throw Components.results.NS_NOT_IMPLEMENTED; 
add: throw Components.results.NS_ERROR_NOT_IMPLEMENTED; 
context:     get icalComponent() {        throw Components.results.NS_NOT_IMPLEMENTED;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/ab44d20dfbace8f3ca56369888a5713e0449f64f/calItemBase.js/clean/calendar/base/src/calItemBase.js