code: def test_saving_models(self, model_in_regular_env):
      self._test_saving_models(model_in_regular_env)
  
imports: import os
  import re
  import pytest
  import pytorch_lightning
  import torch
  from pytorch_lightning import LightningModule, Trainer
  from pytorch_lightning.callbacks import ModelCheckpoint
  from pytorch_lightning.loggers.neptune import NeptuneLogger
  from torch.utils.data import DataLoader, Dataset
  import neptune
  from tests.e2e.base import BaseE2ETest
label_desc: Use image node_id 5 for calling the TestPytorchLightning obj's underlying member method code with example usage: obj.test_saving_models(model_in_regular_env) without return types