How is the tracking number of a shipping managed and sended to the client ?

[Andrea Perez]

Hi, I'm using ofbiz 9. I would like to know how its managed the tracking number of a shipping group. I am seeing in the orderheader.ftl file a field called trackingNumber, that the client can see when we are sending the order complete email. But I didn't see any service or class updating that value in the entity OrderItemShipGroup. I'm actually developing a third party shipment method and I found very interesting the ability to send the tracking number automatically to the client when its updated that field in the facility module, but i think that this is not a OOTB function.

Thanks.