// deserialized. If it can return a UUID from that data, and if there's an
// entity with that UUID, then return its ID.
if (($normalizer instanceof UuidReferenceInterface) && ($uuid = $normalizer->getUuid($data))) {
// deserialized. If it can return a UUID from that data, and if there's an
// entity with that UUID, then return its ID.
if (($normalizer instanceof UuidReferenceInterface) && ($uuid = $normalizer->getUuid($data))) {