Placeholder token is never registered and set trainable

[ZichengDuan]

Thanks for presenting this work, the method is rather intuitive and effective.

However, it seems that the provided code lacks the registration of the placeholder token and consequently there are no special embeddings set to be trainable, which means that it would be impossible to reproduce the claimed performances in the ACCV paper with the code. It would be really helpful if you could kindly clarify this issue, thanks in advance.

[Fancy93]

Did you run this code? Did you find any other problems?