code: def configure_optimizers(self):
      return torch.optim.SGD(
          self.parameters(), lr=0.01, momentum=0.9, weight_decay=5e-4
      )
  
file_path: BigDL/python/nano/tutorial/training/pytorch-lightning/lightning_train_ipex.py
imports: import torch
  from torchvision import transforms
  from torchvision.datasets import OxfordIIITPet
  from torch.utils.data.dataloader import DataLoader
  import torch
  from torchvision.models import resnet18
  from bigdl.nano.pytorch import Trainer
  import pytorch_lightning
label_desc: Use image node_id 5 for calling the MyLightningModule obj's underlying member method code with example usage: obj.configure_optimizers() and returns: torch