func storeElementObject(obj interface{}) (runtime.Object, error) {
	elem, ok := obj.(*storeElement)
	if !ok {
		return nil, fmt.Errorf("not a storeElement: %v", obj)
	}
	return elem.Object, nil
}

func storeElementIndexFunc(objIndexFunc cache.IndexFunc) cache.IndexFunc {
	return func(obj interface{}) (strings []string, e error) {
		seo, err := storeElementObject(obj)
		if err != nil {
			return nil, err
		}