/// SavedModel main op collection key. Used in v1 SavedModels.
inline constexpr char kSavedModelMainOpKey[] = "saved_model_main_op";

// CollectionDef key for the SavedModel train op.
// Not exported while export_all_saved_models is experimental.
inline constexpr char kSavedModelTrainOpKey[] = "saved_model_train_op";

// Schema version for SavedModel.
inline constexpr int kSavedModelSchemaVersion = 1;