PayPal\PayPalAPI\DoAuthorizationReq::toXMLString PHP Method

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