How the cart is being cleared on order saving?

[serafimsorovsky]

My goal is not to clear the cart after placing the order. 

I discover the code of PaymentModuleCore::validateOrder

I noticed that after following call 

$result = $order->add();

the Cart becomes empty. It happens when the order is being placed into DB and if $order->id_cart is set.

 

If I clear $order->id_cart then Cart doesn't become empty.

 

But I can't find the code that clears the Cart.

Edited April 6, 2017 by serafimsorovsky (see edit history)

[hakeryk2]

Well, maybe just recreate cart after order is submitted using $recreated_cart =  $order->getCartProducts() if $order object is still valid. If not use $order = new Order((int)$id_order).