code: def val_dataloader(self):
      return DataLoader(
          self.test_dataset,
          batch_size=self.batch_size,
          shuffle=self.shuffle,
          num_workers=self.num_workers,
          prefetch_factor=self.prefetch_factor,
      )
  
file_path: generative-models/sgm/data/mnist.py
imports: import pytorch_lightning
  import torchvision
  from torch.utils.data import DataLoader, Dataset
  from torchvision import transforms
label_desc: Use image node_id 5 for calling the MNISTLoader obj's underlying member method code with example usage: obj.val_dataloader() and returns: DataLoader