author Javen
 *  copyright description import { InMsg } from './InMsg' ; export class InImageMsg extends InMsg { private picUrl : string ; private mediaId : string ; private msgId : string ; constructor ( toUserName , fromUserName , createTime , msgType ) { super ( toUserName , fromUserName , createTime , msgType ) ; } public get getPicUrl ( ) : string { return this . picUrl ; } public set setPicUrl ( picUrl ) { this . picUrl = picUrl ; } public get getMediaId ( ) : string { return this . mediaId ; } public set setMediaId ( mediaId ) { this . mediaId = mediaId ; } public get getMsgId ( ) : string { return this . msgId ; } public set setMsgId ( msgId ) { this . msgId = msgId ; } }