code: def append_message(self, role, message):
      self.messages.append([role, message])
  
file_path: ColossalAI/applications/ColossalEval/colossal_eval/utils/conversation.py
imports: import dataclasses
  from enum import Enum, auto
  from typing import Dict, List, Optional, Tuple
  from transformers import AutoTokenizer
label_desc: Use image node_id 5 for calling the Conversation obj's underlying member method code with example usage: obj.append_message(role, message) without return types