code: def set_session(self, sess) -> None:
      super().set_session(sess)
  
      # we check here if we are in batch-rl, since this is the only place where we have a graph_manager to question
      assert isinstance(
          self.parent_level_manager.parent_graph_manager,
          BatchRLGraphManager,
      ), "DDQNBCQ agent can only be used in BatchRL"
  
imports: from collections import OrderedDict
  from copy import deepcopy
  from typing import Union, List, Dict
  import numpy
  from rl_coach.agents.dqn_agent import DQNAgentParameters, DQNAlgorithmParameters, DQNAgent
  from rl_coach.base_parameters import Parameters
  from rl_coach.core_types import EnvironmentSteps, Batch, StateType
  from rl_coach.graph_managers.batch_rl_graph_manager import BatchRLGraphManager
  from rl_coach.logger import screen
  from rl_coach.memories.non_episodic.differentiable_neural_dictionary import AnnoyDictionary
  from rl_coach.schedules import LinearSchedule
label_desc: Use image node_id 4 for calling the DDQNBCQAgent obj's underlying member method code with example usage: obj.set_session(sess) without return types