code: def __getstate__(self):
      state = self.__dict__.copy()
      # Serializes the private key to make the class instances picklable
      state["_private_key"] = self.to_bytes()
      return state
  
imports: from __future__ import annotations
  import base64
  import threading
  from abc import ABC, abstractmethod
  from cryptography import exceptions
  from cryptography.hazmat.primitives import hashes, serialization
  from cryptography.hazmat.primitives.asymmetric import padding, rsa
label_desc: Use image node_id 6 for calling the RSAPrivateKey obj's underlying member method code with example usage: obj.__getstate__() and returns: state