code: def get_dialogue_task_mutators(opt: Opt) -> str:
      """
      Set the mutators appropriately for the dialogue tasks.
      """
      mutators = "+".join(
          [
              "flatten",
              "extract_entity_for_response_model",
              "skip_retrieval_mutator",
          ]
      )
      if opt.get("mutators"):
          mutators = "+".join([mutators, opt["mutators"]])
      logging.warning(f"overriding mutators to {mutators}")
      return mutators
  
imports: from typing import Optional
  from parlai.core.opt import Opt
  from parlai.core.params import ParlaiParser
  from parlai.core.teachers import MultiTaskTeacher
  import parlai.tasks.convai2.agents
  import parlai.tasks.blended_skill_talk.agents
  import parlai.tasks.empathetic_dialogues.agents
  import parlai.tasks.wizard_of_internet.agents
  import parlai.tasks.wizard_of_wikipedia.agents
  import parlai.tasks.msc.agents
  import parlai.tasks.ms_marco.agents
  import parlai.utils.logging
  import projects.seeker.tasks.mutators
label_desc: Use image node_id 1 for calling a global function with example usage: get_dialogue_task_mutators(opt) and returns: mutators