inf, exists := f.informers[key]
	if exists {
		checkInformerOverlap(inf, resource, opts)
		return f.makeStartableInformer(inf.informer, key)
	}

	informer := newFunc()
	f.informers[key] = builtInformer{
		informer:        informer,
		objectTransform: opts.ObjectTransform,
	}

	return f.makeStartableInformer(informer, key)
}

func allowedOverlap(resource schema.GroupVersionResource) bool {