TF_DeleteStatus(status);

  TFE_OpSetAttrType(op, "T", TFE_TensorHandleDataType(in));
  TFE_OpSetAttrString(op, "tensor_name", "dummy", 5);
  TFE_OpSetAttrString(op, "send_device", send_device.c_str(),
                      send_device.size());
  TFE_OpSetAttrString(op, "recv_device", recv_device.c_str(),
                      recv_device.size());

    ret = TFE_OpGetAttrType(op, attr_name, is_list, status);
  } else {
    ret = TF_ATTR_INT;  // Same dummy return as TFE_OpGetAttrType.
  }
  TFE_DeleteOp(op);
  return ret;
}

void TFE_OpSetAttrString(TFE_Op* op, const char* attr_name, const void* value,
                         size_t length) {
  auto s = tensorflow::unwrap(op)->SetAttrString(
      attr_name, static_cast<const char*>(value), length);