/** * @inheritdoc */ public function relationship($data, array $links = [], $meta = null, $statusCode = 200, array $headers = []) { if ($data instanceof PageInterface) { list($data, $meta, $links) = $this->extractPage($data, $meta, $links); } return $this->responses->getIdentifiersResponse($data, $statusCode, $links, $meta, $headers); }