/// 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;

    filename_tensor_name: "saver_filename:0"
    save_tensor_name: "StatefulPartitionedCall:0"
    restore_op_name: "StatefulPartitionedCall_1"
    version: V2
  }
  collection_def {
    key: "saved_model_main_op"
    value {
      node_list {
        value: "NoOp"
      }
    }
  }
  signature_def {
    key: "__saved_model_init_op"
    value {
      outputs {