Why do you use tgt_soft_label.detach() in Ladv?

[Sarmadfismael]

thank you for sharing the code, I have a quaestio related with Ladv, why do you use the detach () in Ladv in this line:

FADA/train_adv.py

Line 186 in a1c6403

tgt_soft_label = tgt_soft_label.detach()

I ask this question because in training of semantic segmentation we need tgt_soft_label to fool the disc model?