rem: this.mRangeStart = null; 
context:     shutdown: function() {        /* tell people that we're no longer running */        var notifier = this.notifier;        notifier.observe(null, "alarm-service-shutdown", null);        if (this.mUpdateTimer) {            this.mUpdateTimer.cancel();            this.mUpdateTimer = null;        }                var calendarManager = this.calendarManager;        calendarManager.removeObserver(this.calendarManagerObserver);        for each(var timer in this.mEvents) {            timer.cancel();        }        this.mEvents = {};        var calendars = calendarManager.getCalendars({});        for each(var calendar in calendars) {            this.unobserveCalendar(calendar);        }        this.calendarManager = null;        this.notifier = null;        this.mRangeStart = null;        this.mRangeEnd = null;        var observerSvc = Components.classes["@mozilla.org/observer-service;1"]                          .getService                          (Components.interfaces.nsIObserverService);        observerSvc.removeObserver(this, "profile-after-change");        observerSvc.removeObserver(this, "xpcom-shutdown");        this.mStarted = false;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/d2c3b149cf01f0c13b7b145d983a07a549258e0c/calAlarmService.js/clean/calendar/base/src/calAlarmService.js