code: def configure_optimizers(self):
      return None
  
imports: import shutil
  import tempfile
  import unittest
  import pytorch_lightning
  from ray.train import CheckpointConfig
  import torch
  from ray.air.constants import TRAINING_ITERATION
  from torch.utils.data import DataLoader, Dataset
  from ray import train, tune
  from ray.tune.integration.pytorch_lightning import TuneReportCheckpointCallback
label_desc: Use image node_id 7 for calling the _MockModule obj's underlying member method code with example usage: obj.configure_optimizers() and returns: None