Iyzipay\Request\RetrieveSubMerchantRequest::toPKIRequestString PHP Méthode

    public function toPKIRequestString()
    {
        return RequestStringBuilder::create()->appendSuper(parent::toPKIRequestString())->append("subMerchantExternalId", $this->getSubMerchantExternalId())->getRequestString();
    }