impose_sumrules default setting
Created by: RoyStegeman
@scarlehoff This is what was causing my confusion yesterday (and actually took me more time than I'd like to admit before I realised it): I was unable to recognise the PDFs in the results I obtained with pdfNN_layer_generator because the default of that function is impose_sumrule=False. In ModelTrainer it's initialized as True (see below), so during a regular n3fit this sets it to be True.