code: public GetDomainSummaryStatisticsResponse getDomainSummaryStatistics(GetDomainSummaryStatisticsRequest request) {
          checkNotNull(request, "The parameter request should NOT be null.");
  
          checkStringNotEmpty(request.getStartTime(), "startTime should NOT be empty.");
          InternalRequest internalRequest = createRequest(HttpMethodName.GET, request,
                  STATISTICS, LIVE_DOMAIN, "summary");
          internalRequest.addParameter("startTime", request.getStartTime());
          if (request.getEndTime() != null) {
              internalRequest.addParameter("endTime", request.getEndTime());
          }
          return invokeHttpClient(internalRequest, GetDomainSummaryStatisticsResponse.class);
      }
docs: get all domains' summary statistics in the live stream service.
  
  @param request The request object containing all options for getting all domains' summary statistics
  @return the response