code: def __reduce__(self):
      # Pickling support
      return plist, (list(self),)
  
imports: from collections.abc import Sequence, Hashable
  from numbers import Integral
  from functools import reduce
  from typing import Generic, TypeVar
label_desc: Use image node_id 1 for calling the _PListBase obj's underlying member method code with example usage: obj.__reduce__() and returns: plist,  list