Neos\Flow\Mvc\Controller\Arguments::offsetSet PHP Метод

    public function offsetSet($offset, $value)
    {
        if (!$value instanceof Argument) {
            throw new \InvalidArgumentException(sprintf('Controller arguments must be valid %s objects.', Argument::class), 1187953786);
        }
        $argumentName = $value->getName();
        parent::offsetSet($argumentName, $value);
        $this->argumentNames[$argumentName] = true;
    }