code: def _get_opt_value(self, opt, key, subagent_name):
      subagent_key = f"{subagent_name}_{key}"
      if "override" in opt:
          if subagent_key in opt["override"]:
              return opt["override"][subagent_key]
          if key in opt["override"]:
              return opt["override"][key]
      if subagent_key in opt:
          return opt[subagent_key]
      return opt.get(key)
  
imports: import torch
  import torch.nn.functional
  import copy
  from typing import Optional, List, Tuple, Any, Dict, Union
  from parlai.core.opt import Opt
  from parlai.core.params import ParlaiParser
  from parlai.core.torch_agent import Batch
  from parlai.core.message import Message
  from parlai.agents.rag.retrievers import Document
  from parlai.agents.fid.fid import SearchQueryFiDAgent, WizIntGoldDocRetrieverFiDAgent
  import parlai.utils.logging
  from projects.seeker.agents.seeker_modules import ComboFidModel
  from projects.seeker.agents.seeker import ComboFidAgent, SeekerAgent
  from projects.fits.agents.director_bb2 import DirectorFidAgent, DirectorFidModelMixin
label_desc: Use image node_id 4 for calling the DirectorSeekerAgent obj's underlying member method code with example usage: obj._get_opt_value(opt, key, subagent_name) and returns: opt, opt, opt, opt