public function setGatewayUrl($gatewayUrl, $gatewayMode)
    {
        $this->checkGatewayMode($gatewayMode);

        switch ($gatewayMode)
        {
            case self::GATEWAY_MODE_SANDBOX:
            {
                $this->setGatewayUrlSandbox($gatewayUrl);
                break;
            }
            case self::GATEWAY_MODE_PRODUCTION:
            {
                $this->setGatewayUrlProduction($gatewayUrl);
                break;
            }
        }

        return $this;
    }