code: def test_bad_union_unique():
      D1 = muda.deformers.TimeStretch(rate=2.0)
      D2 = muda.deformers.TimeStretch(rate=1.5)
  
      muda.Union([("stretch", D1), ("stretch", D2)])
  
imports: from copy import deepcopy
  import re
  import six
  import numpy
  import soundfile
  import jams
  import librosa
  import muda
  import pytest
  import scipy
  from contextlib import contextmanager
label_desc: Use image node_id 42 for calling a global function with example usage: test_bad_union_unique() without return types