code: public DnsBatchResult<Page<ChangeRequest>> listChangeRequests(
        String zoneName, Dns.ChangeRequestListOption... options) {
      DnsBatchResult<Page<ChangeRequest>> result = new DnsBatchResult<>();
      Map<DnsRpc.Option, ?> optionMap = DnsImpl.optionMap(options);
      RpcBatch.Callback<ChangesListResponse> callback =
          createListChangeRequestsCallback(zoneName, result, optionMap);
      batch.addListChangeRequests(zoneName, callback, optionMap);
      return result;
    }
docs: Adds a request representing the "list change requests" operation in the zone specified by
  {@code zoneName} to this batch. The {@code options} can be used to restrict the fields returned
  or provide page size limits in the same way as for {@link Dns#listChangeRequests(String,
  Dns.ChangeRequestListOption...)}. Calling {@link DnsBatchResult#get()} on the return value
  yields a page of change requests if successful and throws a {@link DnsException} if the
  operation failed or the zone does not exist.