code: def get_reason_class(self) -> AbstractReason:
      return StepByStepReason
  
imports: import random
  from typing import Optional
  from parlai.tasks.reasoning.agents import MWPStepsReasoningTeacher
  from parlai.tasks.reasoning.base import AbstractQuestionAnswer, AbstractReason, AbstractReasoningTeacher
  from parlai.tasks.reasoning.question_answer import MultipleChoiceQuestionAnswer
  from parlai.tasks.reasoning.reason_types.step_by_step import StepByStepReason
  from parlai.core.opt import Opt
  from parlai.core.params import ParlaiParser
  from parlai.core.teachers import DialogTeacher
  from parlai.utils.io import PathManager
  from parlai.tasks.aqua.build import build
  import os
  import copy
  import json
label_desc: Use image node_id 2 for calling the AQuAReasoningTeacher obj's underlying member method code with example usage: obj.get_reason_class() and returns: StepByStepReason