public function additional($gateway = null, $module = null)
    {
        $this->additional = new Additional();
        $this->additional->setGateway($gateway);
        $this->additional->setModule($module);

        return $this;
    }
public function additional($gateway = null, $module = null)
    {
        $this->additional = new Additional();
        $this->additional->setGateway($gateway);
        $this->additional->setModule($module);

        return $this;
    }
@param integer $gateway
@param integer $module

@return Transaction