code: public Observable<ServiceResponse<Page<RouteFilterRuleInner>>> listByRouteFilterWithServiceResponseAsync(final String resourceGroupName, final String routeFilterName) {
          return listByRouteFilterSinglePageAsync(resourceGroupName, routeFilterName)
              .concatMap(new Func1<ServiceResponse<Page<RouteFilterRuleInner>>, Observable<ServiceResponse<Page<RouteFilterRuleInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<RouteFilterRuleInner>>> call(ServiceResponse<Page<RouteFilterRuleInner>> page) {
                      String nextPageLink = page.body().nextPageLink();
                      if (nextPageLink == null) {
                          return Observable.just(page);
                      }
                      return Observable.just(page).concatWith(listByRouteFilterNextWithServiceResponseAsync(nextPageLink));
                  }
              });
      }
docs: Gets all RouteFilterRules in a route filter.
  
  @param resourceGroupName The name of the resource group.
  @param routeFilterName The name of the route filter.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;RouteFilterRuleInner&gt; object