How to get region proposals from Faster-RCNN?

I’m trying to find the region proposals created by the Region Proposal Network during inference time in the Faster-RCNN model. To be clear, I’m looking for either the bounding box coordinates of these region proposals or the full regions proposals themselves. I’ve tried looking into the many different networks that comprise the whole model (via forward hooks and looking at the model architecture), but I can’t seem to find what I’m looking for. If anyone can tell me where I can pull the coordinates or the regions themselves from, it would be much appreciated.