public function getAllDaxkoBranchIds() {
    $daxko_ids = [];

    $ids = $this->queryFactory
      ->get('mapping')
      ->condition('type', 'branch')
      ->execute();

    if (!$ids) {
      return [];
    }

    $storage = $this->entityTypeManager->getStorage('mapping');
    $entities = $storage->loadMultiple($ids);
    foreach ($entities as $entity) {
      $daxko_ids[] = $entity->field_daxko_branch_id->value;
    }

    return $daxko_ids;
  }