for (const auto& input : inputs) {
      TensorProto tensor_proto;
      input.second.AsProtoTensorContent(&tensor_proto);
      protos.push_back({input.first, std::move(tensor_proto)});
    }
  }

  SignatureDef sig_;
  google::protobuf::Map<std::string, TensorProto> request_;
  std::map<std::string, TensorProto> unaliased_request_;
  TensorProto input_x_, input_y_, default_x_, default_y_;
};

  // (TF1 SavedModel only) Collection of tags identifying the MetaGraphDef
  // within the SavedModel to analyze. If not specified, ["serve"] is used.
  repeated string tags = 5;

  // Sequence of keys identifying SignatureDef containing inputs and outputs.
  // If not specified, ["serving_default"] is used.
  repeated string signature_keys = 6;

  // A map from signature keys to the corresponding representative dataset.