/**
  * @param string slug
  */
 public function findOneBySlug($slug)
 {
     return $this->entityManager->findOneBy(Channel::class, 'slug', $slug);
 }
 /**
  * @param string $uuid
  */
 public function find($uuid)
 {
     return $this->entityManager->findOneBy(VideoProxy::class, 'uuid', $uuid);
 }