code: public Observable<ServiceResponse<Page<ResourceMetricInner>>> listMultiRoleMetricsWithServiceResponseAsync(final String resourceGroupName, final String name, final String startTime, final String endTime, final String timeGrain, final Boolean details, final String filter) {
          return listMultiRoleMetricsSinglePageAsync(resourceGroupName, name, startTime, endTime, timeGrain, details, filter)
              .concatMap(new Func1<ServiceResponse<Page<ResourceMetricInner>>, Observable<ServiceResponse<Page<ResourceMetricInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<ResourceMetricInner>>> call(ServiceResponse<Page<ResourceMetricInner>> page) {
                      String nextPageLink = page.body().nextPageLink();
                      if (nextPageLink == null) {
                          return Observable.just(page);
                      }
                      return Observable.just(page).concatWith(listMultiRoleMetricsNextWithServiceResponseAsync(nextPageLink));
                  }
              });
      }
docs: Get metrics for a multi-role pool of an App Service Environment.
  Get metrics for a multi-role pool of an App Service Environment.
  
  @param resourceGroupName Name of the resource group to which the resource belongs.
  @param name Name of the App Service Environment.
  @param startTime Beginning time of the metrics query.
  @param endTime End time of the metrics query.
  @param timeGrain Time granularity of the metrics query.
  @param details Specify &lt;code&gt;true&lt;/code&gt; to include instance details. The default is &lt;code&gt;false&lt;/code&gt;.
  @param filter Return only usages/metrics specified in the filter. Filter conforms to odata syntax. Example: $filter=(name.value eq 'Metric1' or name.value eq 'Metric2') and startTime eq '2014-01-01T00:00:00Z' and endTime eq '2014-12-31T23:59:59Z' and timeGrain eq duration'[Hour|Minute|Day]'.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;ResourceMetricInner&gt; object