add: if (!aNewItem.recurrenceId) {  aOldItem = aOldItem.parentItem; } 
context:         onModifyItem: function(aNewItem, aOldItem) {            this.alarmService.removeAlarm(aOldItem);            this.onAddItem(aNewItem);        },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9421/1cd49074143f54263da74bb865cc138a08539b45/calAlarmService.js/clean/calendar/base/src/calAlarmService.js