Ogone\AbstractPaymentRequest::setParamvar PHP Method

    public function setParamvar($paramvar)
    {
        if (strlen($paramvar) < 2 || strlen($paramvar) > 50) {
            throw new InvalidArgumentException("Paramvar must be between 2 and 50 characters in length");
        }
        $this->parameters['paramvar'] = $paramvar;
    }