Question for searching latent feature in mmdetection models

[beaglemong]

Hi. First of all, thanks for letting us use various models easily. This really helped me a lot.
I have a question, though. I want to see some of the features that passed through model that is saved in mmdetection, during training.
I trained faster rcnn with coco dataset, and I tried to find a code that actually stated model's training part, but I can't find "mmcv.cnn." part.
Can you help me out or suggest better ideas for finding features that pass through model's layers during training?
Thanks.