class Validator {

    public GameType checkGameType(String input) {
        checkGameName(input, Validator.CANT_BE_NULL);

        GameType type = gameService.getGame(input);
        if (type == NullGameType.INSTANCE) {
            throw new IllegalArgumentException("Game not found: " + input);
        }
        return type;
    }

    public  Validator();

}