if !i.eventHandlers.Insert(f) {
		i.inf.AddEventHandler(informerEventHandler[I](func(o Event[I], initialSync bool) {
			f([]Event[I]{o}, initialSync)
		}))
	}
	return pollSyncer{
		name: fmt.Sprintf("%v handler", i.name()),
		f:    i.inf.HasSynced,
	}
}

func informerEventHandler[I controllers.ComparableObject](handler func(o Event[I], initialSync bool)) cache.ResourceEventHandler {