code: def build_validation_data_loader(self) -> pytorch.DataLoader:
      return pytorch.DataLoader(
          IdentityDataset(20),
          batch_size=self.context.get_per_slot_batch_size(),
      )
  
file_path: determined/e2e_tests/tests/fixtures/pytorch_identity/model_def.py
imports: from typing import Any, Dict, Tuple
  import torch.utils.data
  from determined import pytorch
label_desc: Use image node_id 5 for calling the IdentityPyTorchTrial obj's underlying member method code with example usage: obj.build_validation_data_loader() and returns: pytorch