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