Sulu\Bundle\CategoryBundle\Entity\Category::setKey PHP 메소드

    public function setKey($key)
    {
        $this->key = $key;
        return $this;
    }

 private function createCategory($key)
 {
     $category = new Category();
     $category->setKey($key);
     $category->setDefaultLocale('en');
     $this->em->persist($category);
     return $category;
 }