code: def example_batch(dummy: ep.Tensor) -> Tuple[ep.Tensor, ep.Tensor]:
      x = ep.arange(dummy, 6).float32().reshape((2, 3))
      x = x / x.max()
      reference = x
      perturbed = 1 - x
      return reference, perturbed
  
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 3 for calling a global function with example usage: example_batch(dummy) and returns: reference,  perturbed