code: def token_expiration_threshold_sec(self):
      return self.__token_expiration_threshold_sec
  
imports: import sys
  from abc import ABCMeta, abstractmethod
  from time import time
  import jwt
  from jwt.algorithms import get_default_algorithms
  import six
label_desc: Use image node_id 1 for calling the TokenManager obj's underlying member method code with example usage: obj.token_expiration_threshold_sec() and returns: self