serializer = $serializer; $this->model = $model; $this->attributes = &$attributes; $this->actor = $serializer->getActor(); } /** * @param string $serializer * @return bool */ public function isSerializer($serializer) { return $this->serializer instanceof $serializer; } /** * @param DateTime|null $date * @return string|null */ public function formatDate(DateTime $date = null) { if ($date) { return $date->format(DateTime::RFC3339); } } }