docstr: How to perturb the text.
docstr_tok: ["How","to","perturb","the","text","."]
code: def perturb(self, text: str, rng: Random) -> str:
      """How to perturb the text."""
      pass
  
file_path: H2O/h2o_hf/helm/src/helm/benchmark/augmentations/perturbation.py
imports: from abc import ABC, abstractmethod
  from dataclasses import replace
  from random import Random
  from typing import List, Optional
  from .perturbation_description import PerturbationDescription
  from helm.benchmark.scenarios.scenario import Input, Instance, Reference, Output
  from helm.common.object_spec import ObjectSpec, create_object
label_desc: Use image node_id 5 for calling the Perturbation obj's underlying member method code with example usage: obj.perturb(text, rng) without return types