def add_model_training_inputs(model):
    """Load the training dataset and attach the training inputs to the model."""
    logger = logging.getLogger(__name__)
    logger.info('Loading dataset: {}'.format(cfg.TRAIN.DATASETS))
    roidb = combined_roidb_for_training(
        cfg.TRAIN.DATASETS, cfg.TRAIN.PROPOSAL_FILES
    )
    logger.info('{:d} roidb entries'.format(len(roidb)))
    model_builder.add_training_inputs(model, roidb=roidb)
Load the training dataset and attach the training inputs to the model.
detectron/utils/train.py