/**
* getting the referrer value as self::BACKEND_ORDER_SOURCE when the order is placed via ADMIN
* otherwise this order is being placed in the FRONTEND return this constant value self::FRONTEND_ORDER_SOURCE
* @return string
*/
protected function _getOrderSource()
{
$session = $this->_getCustomerSession();
$orderSource = $session->getOrderSource() ?: self::FRONTEND_ORDER_SOURCE;
return $this->_coreHelper->getCurrentStore()->isAdmin() ? self::BACKEND_ORDER_SOURCE : $orderSource;
}
