code: @Override
    public <R extends Message> Map<byte[], R> batchCoprocessorService(
        Descriptors.MethodDescriptor methodDescriptor, Message message, byte[] bytes, byte[] bytes2,
        R r) throws ServiceException, Throwable {
      LOG.error("Unsupported batchCoprocessorService("
          + "MethodDescriptor, Message, byte[], byte[], R) called.");
      throw new UnsupportedOperationException();  // TODO
    }
docs: {@inheritDoc}