rem: for each (obs in this.mObservers) { if (obs == aObserver) 
add: for each (obs in aObserver) { if (obs == aObserver) { 
context:     addObserver: function (aObserver, aItemFilter) {        for each (obs in this.mObservers) {            if (obs == aObserver)                return;        }        this.mObservers.push(aObserver);    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/a5c97a5023f8c9effbb0a699f500cdd1891a84c7/calDavCalendar.js/buggy/calendar/providers/caldav/calDavCalendar.js