code: def crazy_reducer(obj):
      return DummyCb42().__reduce__()
  
imports: import copyreg
  import numpy
  import nvidia.dali.fn
  import nvidia.dali.pickling
  import os
  from nvidia.dali import pipeline_def
  from pickle import PicklingError
  from nose_utils import raises
  from test_utils import get_dali_extra_path, restrict_python_version
label_desc: Use image node_id 11 for calling a global function with example usage: crazy_reducer(obj) and returns: DummyCb42