/**
 * @author WMXPY
 * @namespace Util
 * @description Validate Filename
 */
/**
 * Validate filename
 * - Filename should not be empty
 * - Filename should not contain / or \
 *
 * Return null if valid, error message if invalid
 *
 * @param filename
 * @returns null if valid, error message if invalid
 */
export declare const validateFilename: (filename: string) => string | null;