public function setParentOnHydrate(HydrateEvent $event)
    {
        $document = $event->getDocument();
        if (!$document instanceof ArticlePageDocument || $document->getParent()) {
            return;
        }

        $parent = $this->documentManager->find(
            $event->getNode()->getParent()->getIdentifier(),
            $document->getOriginalLocale(),
            $event->getOptions()
        );
        $document->setParent($parent);
    }