class_docstr: replace the target word with its synonym in wordnet
code: def __repr__(self):
      return "SwapTarget" + "_" + self.replacement_type
  
file_path: textflint/textflint/generation/transformation/WSD/swap_target.py
imports: import random
  from ...transformation import Transformation
  from ....input.component.sample.wsd_sample import WSDSample
  from nltk.corpus import wordnet
label_desc: Use image node_id 2 for calling the SwapTarget obj's underlying member method code with example usage: obj.__repr__() and returns: unknown