Variation-Aware Trigger?

[hkchengrex]

Hi, thank you for the code & paper. I am looking through the code and cannot seem to find the implementation of the VAT. It appears to me that the memory scheduling is fixed: https://github.com/haochenheheda/SwiftNet/blob/02c7f449787f4c1c1ad4d21136c3870049725848/eval.py#L42

Am I missing something? Also, does y_t in the paper refer to the binarized "hard" mask or soft mask? Thanks!