add: this.mPropertyParams = {}; 
context:     initItemBase: function () {        var now = jsDateToDateTime(new Date());        this.mProperties = new HashPropertyBag();        this.setProperty("CREATED", now.clone());        this.setProperty("LAST-MODIFIED", now.clone());        this.setProperty("DTSTAMP", now);        this.mAttendees = null;        this.mRecurrenceInfo = null;        this.mAttachments = null;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9421/8968679a2c5ae3b663b1022b82ba57650ee43876/calItemBase.js/clean/calendar/base/src/calItemBase.js