class_docstr: Simple perturbation turning input and references into lowercase.
class_docstr_tok: ["Simple","perturbation","turning","input","and","references","into","lowercase","."]
code: def perturb(self, text: str, rng: Random) -> str:
      return text.lower()
  
imports: from random import Random
  from .perturbation import Perturbation
  from .perturbation_description import PerturbationDescription
label_desc: Use image node_id 2 for calling the LowerCasePerturbation obj's underlying member method code with example usage: obj.perturb(text, rng) and returns: text