add: aItem.id = "uuid:" + (new Date()).getTime(); 
context:     addItem: function (aItem, aListener) {        if (aItem.id == null) {            // is this an error?  Or should we generate an IID?        }        if (this.mItems[aItem.id] != null) {            // is this an error?            if (aListener)                aListener.onOperationComplete (Components.results.NS_ERROR_FAILURE,                                               aItem.id,                                               aListener.ADD,                                               "ID already eists for addItem");            return;        }        this.mItems[aItem.id] = aItem;        // notify observers        this.observeAddItem(aItem);        // notify the listener        if (aListener)            aListener.onOperationComplete (Components.results.NS_OK,                                           aItem.id,                                           aListener.ADD,                                           aItem);    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/3ed5153e77d21e9a1d4b8c6e12e1eb27561e61fc/calMemoryCalendar.js/buggy/calendar/providers/memory/calMemoryCalendar.js