rem: if (!currentItem) 
add: if (!this.currentItem) 
context:                 getNext: function() {                    if (!currentItem)                        throw Components.results.NS_ERROR_UNEXPECTED;                    var rval = this.currentItem;                    this.currentItem = null;                    return rval;                }
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/5bf9dc953f33fed33b7251f25e5c532eeb1e189a/calItemBase.js/clean/calendar/base/src/calItemBase.js