rem: icalcomp[prop.ics] = this[prop.cal]; 
add: var val = this[prop.cal]; if (prop.force || val) icalcomp[prop.ics] = this[prop.cal]; 
context:     mapPropsToICS: function(icalcomp, propmap) {        for (var i = 0; i < propmap.length; i++) {            var prop = propmap[i];            icalcomp[prop.ics] = this[prop.cal];        }    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/3ace56c44ca23c45bab9b514b60e5527781ecdf0/calItemBase.js/buggy/calendar/base/src/calItemBase.js