class_docstr: A constraint on METEOR score difference.
  
  Args:
      max_meteor (int): Max METEOR score allowed.
      compare_against_original (bool):  If `True`, compare new `x_adv` against the original `x`.
          Otherwise, compare it against the previous `x_adv`.
class_docstr_tok: ["A","constraint","on","METEOR","score","difference",".","Args",":","max_meteor","(","int",")",":","Max","METEOR","score","allowed",".","compare_against_original","(","bool",")",":","If","`","True","`",",","compare","new","`","x_adv","`","against","the","original","`","x","`",".","Otherwise",",","compare","it","against","the","previous","`","x_adv","`","."]
code: def extra_repr_keys(self):
      return ["max_meteor"] + super().extra_repr_keys()
  
imports: import nltk
  from textattack.constraints import Constraint
label_desc: Use image node_id 3 for calling the METEOR obj's underlying member method code with example usage: obj.extra_repr_keys() and returns: unknown