rem: Components.interfaces.calIObserver 
add: Components.interfaces.nsIObserver 
context:     getInterfaces: function (count) {        var ifaces = [            Components.interfaces.nsISupports,            Components.interfaces.calIAlarmService,            Components.interfaces.calIObserver        ];        count.value = ifaces.length;        return ifaces;    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/9d074667f4af69122ee995eabadb3b6efd1e4683/calAlarmService.js/buggy/calendar/base/src/calAlarmService.js