notifyNeedsReview redux

jobitem.php

  /**
   * Notify the owner of the Job using courier.
   */
  private function notifyNeedsReview() {
    $template_collection_ids = \Drupal::state()->get('tmgmt_notifications_template_collections', []);
    if (isset($template_collection_ids['job_item_needs_review'])) {
      $id = $template_collection_ids['job_item_needs_review'];

      /** @var \Drupal\courier\TemplateCollectionInterface $template_collection */
      $template_collection = TemplateCollection::load($id);
      $template_collection->setTokenValue('tmgmt_job_item', $this);
      $identity = $this->getJob()->getOwner();
      $mqi = \Drupal::service('courier.manager')
        ->sendMessage($template_collection, $identity);

      if ($mqi instanceof MessageQueueItemInterface) {
        drupal_set_message(t('Message queued for delivery.'));
      }
      else {
        drupal_set_message(t('Failed to send message'), 'error');
      }
    }
  }