code: def get_decision_opt_mutators(opt: Opt):
      mutators = "+".join(
          [
              "prefix_speakers_opt",
              "format_decision_tasks_for_decoder_only",
          ]
      )
      if opt.get("mutators"):
          mutators = "+".join([opt["mutators"], mutators])
      logging.warning(f"overriding mutators to {mutators}")
      return mutators
  
imports: from parlai.core.opt import Opt
  import parlai.utils.logging
  from projects.bb3.tasks.r2c2_decision_tasks import Convai2MemoryDecisionTeacher, EDMemoryDecisionTeacher, BSTMemoryDecisionTeacher, MSCMemoryDecisionTeacher, WowSearchDecisionTeacher, NQOpenSearchDecisionTeacher, SquadSearchDecisionTeacher, TriviaQASearchDecisionTeacher, Convai2SearchDecisionTeacher, EDSearchDecisionTeacher, MSCSearchDecisionTeacher, WoiSearchDecisionTeacher
label_desc: Use image node_id 1 for calling a global function with example usage: get_decision_opt_mutators(opt) and returns: mutators