code: public ServiceFuture<List<PoolUsageMetrics>> listUsageMetricsNextAsync(final String nextPageLink, final PoolListUsageMetricsNextOptions poolListUsageMetricsNextOptions, final ServiceFuture<List<PoolUsageMetrics>> serviceFuture, final ListOperationCallback<PoolUsageMetrics> serviceCallback) {
          return AzureServiceFuture.fromHeaderPageResponse(
              listUsageMetricsNextSinglePageAsync(nextPageLink, poolListUsageMetricsNextOptions),
              new Func1<String, Observable<ServiceResponseWithHeaders<Page<PoolUsageMetrics>, PoolListUsageMetricsHeaders>>>() {
                  @Override
                  public Observable<ServiceResponseWithHeaders<Page<PoolUsageMetrics>, PoolListUsageMetricsHeaders>> call(String nextPageLink) {
                      return listUsageMetricsNextSinglePageAsync(nextPageLink, poolListUsageMetricsNextOptions);
                  }
              },
              serviceCallback);
      }
docs: Lists the usage metrics, aggregated by pool across individual time intervals, for the specified account.
  If you do not specify a $filter clause including a poolId, the response includes all pools that existed in the account in the time range of the returned aggregation intervals. If you do not specify a $filter clause including a startTime or endTime these filters default to the start and end times of the last aggregation interval currently available; that is, only the last aggregation interval is returned.
  
  @param nextPageLink The NextLink from the previous successful call to List operation.
  @param poolListUsageMetricsNextOptions Additional parameters for the operation
  @param serviceFuture the ServiceFuture object tracking the Retrofit calls
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object