PayPal\PayPalAPI\ExecuteCheckoutOperationsReq::toXMLString PHP Method

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