code: def forward(self, x):
      return self.model(x)
  
file_path: BigDL/python/nano/tutorial/training/pytorch/pytorch_train_multi_instance.py
imports: import torch
  from torch import nn
  from torch.utils.data import DataLoader
  from torchvision import transforms
  from torchvision.models import resnet18
  from torchvision.datasets import OxfordIIITPet
  from pytorch_lightning import seed_everything
  from bigdl.nano.pytorch import TorchNano
label_desc: Use image node_id 2 for calling the MyPytorchModule obj's underlying member method code with example usage: obj.forward(x) and returns: self