class_docstr: Replaces words randomly with common misspellings, from a list of common misspellings.
  
  Perturbation example:
  
  **Input:**
      Already, the new product is not available.
  
  **Output:**
      Aready, the new product is not availible.
code: def description(self) -> PerturbationDescription:
      return MisspellingPerturbation.Description(
          name=self.name, robustness=True, prob=self.prob
      )
  
file_path: H2O/h2o_hf/helm/src/helm/benchmark/augmentations/misspelling_perturbation.py
imports: from dataclasses import dataclass
  import json
  from pathlib import Path
  import re
  from random import Random
  from typing import Dict, List
  from helm.common.general import match_case
  from .perturbation import Perturbation
  from .perturbation_description import PerturbationDescription
label_desc: Use image node_id 2 for calling the MisspellingPerturbation obj's underlying member method code with example usage: obj.description() and returns: MisspellingPerturbation