code: def get_reason_class(self) -> AbstractReason:
      return DummyReason
  
imports: import unittest
  from parlai.core.params import ParlaiParser
  import parlai.utils.testing
  from parlai.tasks.reasoning.base import AbstractQuestionAnswer, AbstractReason, AbstractReasoningTeacher
  from dataclasses import dataclass
label_desc: Use image node_id 2 for calling the DummyAbstractReasoningTeacher obj's underlying member method code with example usage: obj.get_reason_class() and returns: DummyReason