class_docstr: Word replace transformation to implement normal word replace functions.
class_docstr_tok: ["Word","replace","transformation","to","implement","normal","word","replace","functions","."]
docstr: Returns the index of the replaced tokens.
  
  :param list tokens: tokenized words or word with pos tag pairs
  :return list: the index of the replaced tokens
docstr_tok: ["Returns","the","index","of","the","replaced","tokens",".",":","param","list","tokens",":","tokenized","words","or","word","with","pos","tag","pairs",":","return","list",":","the","index","of","the","replaced","tokens"]
code: def skip_aug(self, tokens, mask, pos=None):
      r"""
      Returns the index of the replaced tokens.
  
      :param list tokens: tokenized words or word with pos tag pairs
      :return list: the index of the replaced tokens
  
      """
      raise NotImplementedError
  
file_path: textflint/textflint/generation/transformation/word_substitute.py
imports: import string
  from abc import abstractmethod
  from ..transformation import Transformation
  from ...common.settings import STOP_WORDS, ORIGIN
  from ...common.utils.list_op import trade_off_sub_words
label_desc: Use image node_id 5 for calling the WordSubstitute obj's underlying member method code with example usage: obj.skip_aug(tokens, mask, pos) without return types