huixiang_app/lib/im/im_view/on_chat_msg_instance.dart

import 'on_chat_message.dart';

class OnChatMsgInstance{
  factory OnChatMsgInstance() => _getInstance();

  static OnChatMsgInstance get instance => _getInstance();

  static OnChatMsgInstance _instance;

  OnChatMessage onChatMessage;

  OnChatMsgInstance._internal();

  static OnChatMsgInstance _getInstance(){
    if(_instance == null){
      _instance = OnChatMsgInstance._internal();
    }
    return _instance;
  }
}