class_docstr: sentinel for empty closures
class_docstr_tok: ["sentinel","for","empty","closures"]
code: def __reduce__(cls):
      return cls.__name__
  
imports: import builtins
  import dis
  import opcode
  import platform
  import sys
  import types
  import weakref
  import uuid
  import threading
  import typing
  import warnings
  from .compat import pickle
  from collections import OrderedDict
  from typing import ClassVar, Generic, Union, Tuple, Callable
  from pickle import _getattribute
label_desc: Use image node_id 1 for calling the _empty_cell_value obj's underlying member method code with example usage: obj.__reduce__(cls) and returns: cls