add: if (this.readOnly) throw Components.interfaces.calIErrors.CAL_IS_READONLY; 
context:     addItem: function (aItem, aListener) {        this.mDefaultCalendar.addItem (aItem, aListener);    },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/8127ab2430d6b0c7879a491f0176f55c41966c25/calCompositeCalendar.js/clean/calendar/providers/composite/calCompositeCalendar.js