declare const _default: {
    alpha: any;
    email: any;
    url: any;
    int: any;
    float: any;
    decimal: any;
    date: any;
    before: any;
    after: any;
    contains: any;
    in: any;
    required(val: any): boolean;
};
export default _default;
export declare function invalidateValue(value: any): boolean;