code: def get_key(self) -> str:
      return (
          super().get_key()
          + f"_{'_'.join(criterion.get_key() for criterion in self.criteria)}"
      )
  
imports: import abc
  from typing import List, Union
  import torch
label_desc: Use image node_id 3 for calling the PipelinedCriterion obj's underlying member method code with example usage: obj.get_key() and returns: unknown