rem: obs.onModifyItem (aOldItem, aNewItem); 
add: obs.onModifyItem (aNewItem, aOldItem); 
context:     observeModifyItem: function (aOldItem, aNewItem) {        for each (obs in this.mObservers)            obs.onModifyItem (aOldItem, aNewItem);    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/9306744053ef946307cd3434b6fb87055eca9115/calStorageCalendar.js/clean/calendar/providers/storage/calStorageCalendar.js