public function get_tree(string $id, bool $with_config = true): array
  {
    if (
      \bbn\str::is_uid($id) &&
      ($p = $this->get($id, $with_config))
    ){
      $p['items'] = $this->get_full_bits($id, null, $with_config);
      return $p;
    }
    return [];
  }