code: def obfuscatable_class(tokens, index, **kwargs):
      
      tok = tokens[index]
      token_type = tok[0]
      token_string = tok[1]
      if index > 0:
          prev_tok = tokens[index-1]
      else: # Pretend it's a newline (for simplicity)
          prev_tok = (54, '\n', (1, 1), (1, 2), '#\n')
      prev_tok_string = prev_tok[1]
      if token_type != tokenize.NAME:
          return None # Skip this token
      if token_string.startswith('__'): # Don't mess with specials
          return None
      if prev_tok_string == "class":
          return token_string
docs: Given a list of *tokens* and an *index* (representing the current position),
      returns the token string if it is a class name that can be safely
      obfuscated.