code: def test_dataloader(self):
      dataset = LRS3(self.args, subset="test")
      dataset = TransformDataset(dataset, self.test_transform)
      dataloader = torch.utils.data.DataLoader(dataset, batch_size=None)
      return dataloader
  
imports: import random
  import torch
  from lrs3 import LRS3
  from pytorch_lightning import LightningDataModule
label_desc: Use image node_id 4 for calling the LRS3DataModule obj's underlying member method code with example usage: obj.test_dataloader() and returns: dataloader