docstr: Raise NotImplementedError.
docstr_tok: ["Raise","NotImplementedError","."]
code: def __len__(self):
      """Raise NotImplementedError."""
      raise NotImplementedError
  
file_path: pytorch-lightning/tests/tests_fabric/helpers/dataloaders.py
label_desc: Use image node_id 1 for calling the CustomNotImplementedErrorDataloader obj's underlying member method code with example usage: obj.__len__() without return types