class_docstr: Transforms an input by replacing its words with synonyms provided by
  WordNet. Download nltk_data before running.
code: def skip_aug(self, tokens, mask, pos=None):
      return self.pre_skip_aug(tokens, mask)
  
imports: from ...transformation import WordSubstitute
label_desc: Use image node_id 4 for calling the SwapSynWordNet obj's underlying member method code with example usage: obj.skip_aug(tokens, mask, pos) and returns: self