Mask rcnn and faster rcnn do not show validation loss

Hi.
I want to implement early stopping for faster rcnn and mask rcnn. But faster rcnn do not show validation loss during training and just print validation done!
also mask rcnn do not print validation loss.

During the faster_rcnn training, in each epoch, there are 4 kinds of loss printing.
You can leverage them for early stopping.
For specific epoch, mAPs are computed. It will also show AP, precision, recall and RPN_recall.