export default class DFWUtils {
    static readonly EMAIL_REGEX: RegExp;
    static isEmail(email: string): boolean;
    /**
     *
     * @param duration ms of sleeping
     */
    static sleepAsync(duration: number): Promise<void>;
    /**
     *
     * @param path
     */
    static getMimetype(path: string): string | false;
    /**
     * retrive file extension
     * @param filePath
     */
    static getExtension(filePath: string): string;
    static getBaseName(filePath: string): void;
    /**
     *
     */
    static randomHexString(len: number): string;
    /**
     *
     */
    static uuid(): string;
}