code: def test_dataloader(self):
      return DataLoader(self.test_data, batch_size=self.batch_size)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from torch.utils.data import DataLoader
  from torchmetrics import Accuracy
  from ray import train
  from ray.train.lightning._lightning_utils import import_lightning
label_desc: Use image node_id 4 for calling the DummyDataModule obj's underlying member method code with example usage: obj.test_dataloader() and returns: DataLoader