code: def add_token(self, idx, token, action, change_seq):
      token_obj = Token(
          token=token,
          start_pos=-1,
          action=action,
          change_seq=change_seq,
      )
      change_log = ChangeLog(orig_token=token_obj)
      self.tokens.insert(idx, change_log)
  
file_path: nlpaug/nlpaug/util/doc/doc.py
imports: from nlpaug.util.doc.token import Token
  from nlpaug.util.doc.change_log import ChangeLog
label_desc: Use image node_id 3 for calling the Doc obj's underlying member method code with example usage: obj.add_token(idx, token, action, change_seq) without return types