Sulu\Bundle\CategoryBundle\Entity\CategoryRepositoryInterface::findCategoryByKey PHP Method

    public function findCategoryByKey($key);

 /**
  * {@inheritdoc}
  */
 public function findByKey($key)
 {
     if (!($entity = $this->categoryRepository->findCategoryByKey($key))) {
         throw new CategoryKeyNotFoundException($key);
     }
     return $entity;
 }