add: for (var i = 0; i < this.mAttendees.length; i++) this.mAttendees[i].makeImmutable(); 
context:     makeItemBaseImmutable: function() {        if (this.mImmutable)            throw Components.results.NS_ERROR_FAILURE;        if (this.mCreationDate)            this.mCreationDate.makeImmutable();        if (this.mRecurrenceInfo)            this.mRecurrenceInfo.makeImmutable();        if (this.mAlarmTime)            this.mAlarmTime.makeImmutable();        this.mImmutable = true;    },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/c2768a9ef27c347866d48f1727752b59043532b5/calItemBase.js/buggy/calendar/base/src/calItemBase.js