docs: public Observable<Page<RoleInner>> listByDataBoxEdgeDeviceNextAsync(final String nextPageLink) {
          return listByDataBoxEdgeDeviceNextWithServiceResponseAsync(nextPageLink)
              .map(new Func1<ServiceResponse<Page<RoleInner>>, Page<RoleInner>>() {
                  @Override
                  public Page<RoleInner> call(ServiceResponse<Page<RoleInner>> response) {
                      return response.body();
                  }
              });
      }