public function read_option(string $id_option = null): ?bool
  {
    if ( bbn\str::is_uid($id_option) ){
      $root = self::get_option_id('options');
      $id_to_check = $this->opt->from_code('opt'.$id_option, $root);
      return $this->has($id_to_check, 'options');
    }
    return null;
  }