How can i change attachment order?

[Cvalya]

Hi.

In general, attachment show in BO by its ID. If i will add attachment to product in some another order than after save it, attachments will be in predefined order from fisrt to last (ID).

 

Where i can find functions which manage this and how can i extend it to add order to attachment? For each product different order to attachments.

 

Thanks.