rem: aItem.calendar.modifyItem (aItem, aListener); 
add: aNewItem.calendar.modifyItem (aNewItem, aOldItem, aListener); 
context:     modifyItem: function (aItem, aListener) {        if (aItem.calendar == null) {            // XXX Can't modify item with NULL parent            throw Components.results.NS_ERROR_FAILURE;        }        aItem.calendar.modifyItem (aItem, aListener);    },
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/f0c77cac48e7ce31af529637a1b48c03f4314901/calCompositeCalendar.js/clean/calendar/providers/composite/calCompositeCalendar.js