function responseNoBackchannel(
    lastArrayIdSentFromServer = undefined, outstandingDataSize = undefined) {
  const responseData =
      googJson.serialize([0, lastArrayIdSentFromServer, outstandingDataSize]);
  channel.onRequestData(getSingleForwardRequest(), responseData);
  channel.onRequestComplete(getSingleForwardRequest());
  mockClock.tick(0);
}
@param {number=} lastArrayIdSentFromServer
@param {number=} outstandingDataSize