Question: Get the loss from the model

[HenrikRehbinder]

Hi, Anybody who knows how to get the loss from the model? Like getting rmse from some regression package - I'd like to get warp, warp-os losses for parameter tuning, finding number of epochs and similar. I don't think it is available, but maybe I am wrong. Or maybe someone has some implementation that they want to share? Best regards and thanks in advance