protected function validateModelArgument() : void
    {
        $model = $this->getInput()->getArgument('model');

        $validator = Validator::create()
            ->string()
            ->alphaNumeric()
            ->noWhitespace();

        if ($this->getDefinition()->getArgument('model')->isRequired()
            && !$validator->validate($model)) {
            throw new InputException($validator->getError());
        }
    }