def buildModels(self):
        raise NotImplementedError("Override this function.")

    # Open training files, called once in train function
get snapshot from internal histogram
dataset/ETHPy150Open yuhaozhang/nnjm-global/code/train_util.py/TrainModel.buildModels--crossover with--dataset/ETHPy150Open omergertel/pyformance/pyformance/meters/timer.py/Timer.get_snapshot