code: def reference_perturbed(
      request: Any, dummy: ep.Tensor
  ) -> Tuple[ep.Tensor, ep.Tensor]:
      return data[request.param](dummy)
  
file_path: foolbox/tests/test_distances.py
imports: from typing import Tuple, Any, Dict, Callable, TypeVar
  import numpy
  import pytest
  import foolbox
  import eagerpy
label_desc: Use image node_id 4 for calling a global function with example usage: reference_perturbed(request, dummy) and returns: data