<< "AreDevicesCompatible should have returned false otherwise!";

  if (!resource_op_device_.has_value()) {
    resource_op_device_ = other->resource_op_device_;
  }

  is_xla_compile_attr_true_ |= other->is_xla_compile_attr_true_;

  if (!xla_scope_.has_value()) {
    xla_scope_ = std::move(other->xla_scope_);
  }

  resource_var_operation_node_ids_.reserve(
      resource_var_operation_node_ids_.size() +