rem: if (!aNewItem instanceof Components.interfaces.calIEvent || 
add: if (!(aNewItem instanceof Components.interfaces.calIEvent) || 
context:     onModifyItem: function(aNewItem, aOldItem) {        if (!aNewItem instanceof Components.interfaces.calIEvent ||            this.mInBatch) {            return;        }        this.removeItemFromTree(aOldItem);        this.addItemToTree(aNewItem);    },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/41e94d16e90bab8695c08288be58d77dcc0da986/unifinder.js/buggy/calendar/resources/content/unifinder.js