code: def __deepcopy__(self, memo):
      cls = self.__class__
      result = cls.__new__(cls)
      memo[id(self)] = result
      for k, v in self.__dict__.items():
          setattr(result, k, deepcopy(v, memo))
      return result
  
imports: from abc import ABC, abstractmethod
  from collections import deque
  from copy import deepcopy
  from enum import IntEnum, auto, unique
  from typing import Any
label_desc: Use image node_id 12 for calling the AbstractExpression obj's underlying member method code with example usage: obj.__deepcopy__(memo) and returns: result