code: def typos(cls):
      def question_typo(x, **kwargs):
          return (x[0], Perturb.add_typos(x[1], **kwargs))
  
      return question_typo
  
imports: from typing import Optional, Iterable, Tuple, Union
  import itertools
  import numpy
  from checklist.editor import MunchWithAdd
  from checklist.test_suite import TestSuite
  from checklist.test_types import MFT
  from checklist.perturb import Perturb
  from allennlp.confidence_checks.task_checklists.task_suite import TaskSuite
  from allennlp.confidence_checks.task_checklists import utils
  from allennlp.predictors import Predictor
label_desc: Use image node_id 5 for calling the QuestionAnsweringSuite obj's underlying member method code with example usage: obj.typos(cls) and returns: question_typo, x,  Perturb