rem: this.mItems[aId] == null) { 
add: this.mItems[aId] == null) { 
context:     deleteItem: function (aId, aListener) {        if (aId == null ||            this.mItems[aId] == null)        {            if (aListener)                aListener.onOperationComplete (this,                                               Components.results.NS_ERROR_FAILURE,                                               aListener.DELETE,                                               aId,                                               "ID doesn't exist for deleteItem");            return;        }        deletedItem = this.mItems[aId];        delete this.mItems[aId];        // notify observers        observeDeleteItem(deletedItem);        if (aListener)            aListener.onOperationComplete (this,                                           Components.results.NS_OK,                                           aListener.DELETE,                                           aId,                                           null);    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/45b66e946e95e64e5e86492156c5692fdc036128/calMemoryCalendar.js/buggy/calendar/providers/memory/calMemoryCalendar.js