if meta.IsListType(result) {
		err := newNotAcceptableError(fmt.Sprintf("you requested PartialObjectMetadata, but the requested object is a list (%T)", result))
		return nil, err
	}
	switch groupVersion {
	case metav1beta1.SchemeGroupVersion, metav1.SchemeGroupVersion:
	default:
		return nil, newNotAcceptableError(fmt.Sprintf("no PartialObjectMetadataList exists in group version %s", groupVersion))
	}