code: def eval_dataset(self):
      pass
  
file_path: ReAgent/reagent/data/reagent_data_module.py
imports: import abc
  from typing import Dict, List, Optional
  import pytorch_lightning
  from reagent.core.parameters import NormalizationData
label_desc: Use image node_id 4 for calling the ReAgentDataModule obj's underlying member method code with example usage: obj.eval_dataset() without return types