/** * Class constructor */ private function __construct() { $this->billingSaleDao = BOL_BillingSaleDao::getInstance(); $this->billingGatewayDao = BOL_BillingGatewayDao::getInstance(); $this->billingGatewayConfigDao = BOL_BillingGatewayConfigDao::getInstance(); $this->billingGatewayProductDao = BOL_BillingGatewayProductDao::getInstance(); $this->billingProductDao = BOL_BillingProductDao::getInstance(); }