rem: if (!(item instanceof Components.interfaces.calIEvent)) return;  
context: function observer_onDeleteItem(item, rebuildFlag){    if (!(item instanceof Components.interfaces.calIEvent))        return;    var occs = item.getOccurrencesBetween(this.agendaTreeView.today.start,                                          this.agendaTreeView.soon.end, {});    occs.forEach(this.agendaTreeView.deleteItem, this.agendaTreeView);    if (rebuildFlag != "no-rebuild")        this.agendaTreeView.rebuildAgendaView();};
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/7932c781db84de8867f7744b9321a8569b1f805e/agenda-tree.js/buggy/calendar/lightning/content/agenda-tree.js