code: @Override
    public <T extends Service, R> Map<byte[], R> coprocessorService(Class<T> service, byte[] startKey,
        byte[] endKey, Batch.Call<T, R> callable) throws ServiceException, Throwable {
      LOG.error("Unsupported coprocessorService(Class, byte[], byte[], Batch.Call) called.");
      throw new UnsupportedOperationException();  // TODO
    }
docs: {@inheritDoc}