FlexiVit is also flexible with image resolution?

Hello, `big_vision` team!

Thanks for your work on the repository.
I trained FlexiVit-B on a fine-grained dataset CUB-200-2011 using pretrained weights from in21k, on a fixed resolution, say 480r, but I found it also performs good when testing on a smaller resolution, 240r. And it almost aligns the testing performance if it was trained on 240r. So my question is, is FlexiVit flexible to image resolution as well?
Thank you and looking forward to your reply.

The report concerns FlexiVit-B, pretrained in21k weights, and CUB-200-2011 at 480r versus 240r. Start by locating the FlexiVit training and evaluation entry points in big_vision and compare the documented resolution behavior; done means providing a clear answer supported by the implementation or experiments.

Written by the indexing model from the issue text.