PayPal\PayPalAPI\BillAgreementUpdateReq::toXMLString PHP 메소드

    public function toXMLString()
    {
        $str = '';
        $str .= '<ns:BillAgreementUpdateReq>';
        if ($this->BAUpdateRequest != null) {
            $str .= '<ns:BAUpdateRequest>';
            $str .= $this->BAUpdateRequest->toXMLString();
            $str .= '</ns:BAUpdateRequest>';
        }
        $str .= '</ns:BillAgreementUpdateReq>';
        return $str;
    }