LinkCollectionNormalizer example

/** * Get an instance of the normalizer to test. */
  protected function getNormalizer(AccountInterface $current_user = NULL) {
    if (is_null($current_user)) {
      $current_user = $this->setUpCurrentUser();
    }
    else {
      $this->setCurrentUser($current_user);
    }
    $normalizer = new LinkCollectionNormalizer($current_user);
    $normalizer->setSerializer($this->serializer);
    return $normalizer;
  }

}