declare class Util {
    walk(res: string[], dir: string, ext?: string): void;
    copyFilesSync(src: string, dest: string): void;
    copyFilesSyncWithExt(src: string, dest: string, ext: string): void;
    copyDirSync(src: string, dest: string): void;
    write(filename: string, value: string): void;
    writeJSON(filename: string, data: unknown): void;
    zipFile(inputfilename: string, value: string, outputFileName: string, outputFolder: string): void;
    useMinify(filename: string): Promise<void>;
    useTinify(key: string, dir: string): Promise<void[]>;
}
declare const singleton: Util;
export { singleton as Util };