rem: this.mObservers = this.mObservers.filter( function (v) { return v != aObserver; } ); 
add: cals.forEach(function (c) { if (mgr.getCalendarPref(c, this.mActivePref)) this.addCalendar(c); if (mgr.getCalendarPref(c, this.mDefaultPref)) this.setDefaultCalendar(c, false); }, this); 
context:         this.mObservers = this.mObservers.filter( function (v) { return v != aObserver; } );
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/8b05923a158c54d8707abcf10b0aaf728fac322a/calCompositeCalendar.js/buggy/calendar/providers/composite/calCompositeCalendar.js