code: def __len__(self) -> int:
      return 64
  
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 2 for calling the IdentityDataset obj's underlying member method code with example usage: obj.__len__() and returns: int