docs: public Observable<ServiceResponse<Page<RoleAssignmentInner>>> listForResourceWithServiceResponseAsync(final String resourceGroupName, final String resourceProviderNamespace, final String parentResourcePath, final String resourceType, final String resourceName, final String filter) {
          return listForResourceSinglePageAsync(resourceGroupName, resourceProviderNamespace, parentResourcePath, resourceType, resourceName, filter)
              .concatMap(new Func1<ServiceResponse<Page<RoleAssignmentInner>>, Observable<ServiceResponse<Page<RoleAssignmentInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<RoleAssignmentInner>>> call(ServiceResponse<Page<RoleAssignmentInner>> page) {
                      String nextPageLink = page.body().nextPageLink();
                      if (nextPageLink == null) {
                          return Observable.just(page);
                      }
                      return Observable.just(page).concatWith(listForResourceNextWithServiceResponseAsync(nextPageLink));
                  }
              });
      }