export declare class ValidationUtil {
    static isValidEmail(email: string): boolean;
    static isValidPassword(password: string): boolean;
    static isValidPhoneNumber(phone: string): boolean;
    static isValidUUID(uuid: string): boolean;
    static isNotEmpty(value: any): boolean;
    static isNumber(value: any): boolean;
    static isString(value: any): boolean;
    static isBoolean(value: any): boolean;
    static isArray(value: any): boolean;
    static isObject(value: any): boolean;
}