public function getNodeCampaignNode(NodeInterface $node) {
    $campaign = NULL;

    if ($node->getType() == 'campaign') {
      return $node;
    }

    if ($node->getType() == 'campaign_page') {
      $campaign = $node->field_campaign_parent->entity;
      if (!empty($campaign)) {
        return $campaign;
      }
    }

    /** @var \Drupal\node\NodeStorage $nodeStorage */
    $nodeStorage = $this->entityTypeManager->getStorage('node');

    // Get Campaign node with reference to given Landing page node.
    /** @var \Drupal\Core\Entity\Query\QueryInterface $query */
    $query = $nodeStorage->getQuery()
      ->condition('status', 1)
      ->condition('type', 'campaign');
    $orGroup = $query->orConditionGroup()
      ->condition('field_campaign_pages', $node->id(), 'IN')
      ->condition('field_pause_landing_page', $node->id());
    $nids = $query->condition($orGroup)->execute();

    /** @var \Drupal\node\NodeInterface $campaign */
    $campaign = $nodeStorage->load(reset($nids));

    return $campaign;
  }