import { NextFunction, Request, Response } from 'express';
export declare class VersionMWs {
    /**
     * This version data is mainly used to trigger page reload on the client side
     */
    static injectAppVersion(req: Request, res: Response, next: NextFunction): Promise<void>;
    /**
     * This version data is mainly used on the client side to invalidate the cache
     */
    static injectGalleryVersion(req: Request, res: Response, next: NextFunction): Promise<void>;
}