Ojs\AdminBundle\Entity\AdminPage::setSlug PHP Method

    public function setSlug($slug)
    {
        $this->slug = $slug;
        return $this;
    }

 protected function createDefaultPages()
 {
     $pages = [['about', 'About', 'About page content goes here.'], ['privacy', 'Privacy', 'Privacy page content goes here.'], ['faq', 'FAQ', 'A list of frequently answered questions goes here.'], ['tos', 'Terms of Service', 'TOS page content goes here.']];
     $em = $this->getContainer()->get('doctrine')->getManager();
     foreach ($pages as $page) {
         $entity = $em->getRepository('OjsAdminBundle:AdminPage')->findOneBy(['slug' => $page[0]]);
         if (!$entity) {
             $entity = new AdminPage();
             $entity->setVisible(true);
             $entity->setCurrentLocale($this->getContainer()->getParameter('locale'));
             $entity->setSlug($page[0]);
             $entity->setTitle($page[1]);
             $entity->setBody($page[2]);
             $em->persist($entity);
         }
     }
     $em->flush();
 }