code: def copy(self):
      return Conversation(
          system=self.system,
          roles=self.roles,
          messages=[[x, y] for x, y in self.messages],
          offset=self.offset,
          sep_style=self.sep_style,
          sep=self.sep,
      )
  
file_path: colossalai/applications/Chat/coati/dataset/conversation.py
imports: import dataclasses
  from enum import Enum, auto
  from typing import List
label_desc: Use image node_id 4 for calling the Conversation obj's underlying member method code with example usage: obj.copy() and returns: Conversation