code: def cell_unpickle():
      return types.CellType(None)
  
file_path: DALI/dali/python/nvidia/dali/reducers.py
imports: import inspect
  import pickle
  import sys
  import types
  import marshal
  import importlib
label_desc: Use image node_id 9 for calling a global function with example usage: cell_unpickle() and returns: types