优化代码，升级版本号为2.7.1

648540858

2024-04-09 54b878d2e1e089cdeb7a957b78aa1f4cbdd6da6c

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package com.genersoft.iot.vmp.service.bean;
 
public interface PlayBackCallback<T> {
 
    void call(PlayBackResult<T> msg);
 
}