class_docstr: Transforms the polarity of target by replacing its opinion words
  with antonyms provided by WordNet or adding the negation that
  pre-defined in our negative word list.
  
  Example::
  
      Original sentence: "BEST spicy tuna roll, great asian salad.
      (Target: spicy tuna roll)"
      Transformed sentence: "BAD spicy tuna roll, great asian salad."
code: def __repr__(self):
      return "RevTgt"
  
file_path: textflint/textflint/generation/transformation/ABSA/rev_tgt.py
imports: from copy import deepcopy
  from .absa_transformation import ABSATransformation
label_desc: Use image node_id 2 for calling the RevTgt obj's underlying member method code with example usage: obj.__repr__() and returns: str