class_docstr: Transforms an input by replacing its words with synonyms provided by
  WordNet. Download nltk_data before running.
code: def __repr__(self):
      return "SwapSynWordNet"
  
imports: from ...transformation import WordSubstitute
label_desc: Use image node_id 2 for calling the SwapSynWordNet obj's underlying member method code with example usage: obj.__repr__() and returns: str