ABAP code of Advanced Return Management

[EricYu0912]

Hi experts,

I'm testing ARM process and have a question about posting change.

Here is a test return delivery, as you can see, two outbound deliveries (posting change in warehouse) will be generated.
If I understand correctly, the first outbound delivery generates a posting change document in warehouse and then triggers goods movment.
Afterwards, the second outbound delivery is created, my question is how it is created? Maybe someone could show the ABAP code here.

Regards,
Eric