code: def forward(self, x):
      x = x.view(x.size(0), -1)
      x = torch.relu(self.l1(x))
      return torch.relu(self.l2(x))
  
file_path: pytorch-lightning/examples/pytorch/ipu/mnist_sample.py
imports: import torch
  from lightning.pytorch import LightningModule, Trainer
  from lightning.pytorch.demos.mnist_datamodule import MNISTDataModule
  from torch.nn import functional
label_desc: Use image node_id 2 for calling the LitClassifier obj's underlying member method code with example usage: obj.forward(x) and returns: torch