one more coding standard description

    return array_flip(array_unique($links));

  }

  /**

   * Check to see if keywords on this object match the passed word.

   *

   * @param \Drupal\alinks\Entity\Keyword $word

   *   An individual keyword.

   */

  protected function addExistingLink(Keyword $word) {

    $this->existingLinks[$word->getUrl()] = TRUE;