let batchedSetGameState = batchUpdates(setGameState)
  batchedSetGameState((old: GameState): GameState => old );
  batchedSetGameState.fireBatch();

    if (key === "set" || key === "getUpdater" || key === "update") {
      throw Error(`Invalid key in updaterGenerator: ${key} conflicts with reserved keywords set, update, getUpdater.`);
    }