MrClay\Cli::addOptionalArg PHP Метод

public addOptionalArg ( Arg \| string $letter ) : Arg
$letter	MrClay\Cli\Arg \| string
Результат	MrClay\Cli\Arg

    public function addOptionalArg($letter)
    {
        return $this->addArgument($letter, false);
    }

Cli