docs: public DnsBatchResult<Page<Zone>> listZones(Dns.ZoneListOption... options) {
      DnsBatchResult<Page<Zone>> result = new DnsBatchResult<>();
      Map<DnsRpc.Option, ?> optionMap = DnsImpl.optionMap(options);
      RpcBatch.Callback<ManagedZonesListResponse> callback =
          createListZonesCallback(result, optionMap);
      batch.addListZones(callback, optionMap);
      return result;
    }