/**
 * @file: serve a page for diff, select and patch
 * @author: yangqianjun
 * @Date: 2019-12-17 20:16:34
 * @LastEditors: yangqianjun
 * @LastEditTime: 2020-01-03 10:23:25
 */
export declare function serveDiff<J extends {}>(curVersion: J, newVersion: J): Promise<J | undefined>;