class_docstr: A constraint disallowing the modification of stopwords.
code: def __init__(self, stopwords=None, language="english"):
      if stopwords is not None:
          self.stopwords = set(stopwords)
      else:
          self.stopwords = set(nltk.corpus.stopwords.words(language))
  
file_path: TextAttack/textattack/constraints/pre_transformation/stopword_modification.py
imports: import nltk
  from textattack.constraints import PreTransformationConstraint
  from textattack.shared.validators import transformation_consists_of_word_swaps
label_desc: Use image node_id 1 to create a new StopwordModification object from inherited base classes: PreTransformationConstraint with example: obj = StopwordModification(stopwords, language)