}

      OpMetadataBuilder op_builder(*builder);
      op_builder.add_index(index);
      uint8_t hardware = hardware_map.at(*device_name);
      op_builder.add_hardware(hardware);

      if (per_device_cost.has_value()) {
        op_builder.add_op_costs(per_device_cost_offset);
      }

      ops.push_back(op_builder.Finish());
    }
    index++;
  }