import Primitive from './primitive';
import Nullable from './nullable';
import type { UndefinedState } from '../types';
declare class Undefined extends Primitive<undefined, undefined, UndefinedState<undefined, undefined>> {
    filter(value: unknown, defaultable: false, quiet: true): boolean;
    filter(value: unknown, defaultable?: boolean, quiet?: false): undefined;
    filter(value: unknown, defaultable?: boolean, quiet?: boolean): undefined | boolean;
    test(value: unknown): value is undefined;
    nullable(): Nullable<undefined>;
}
export default Undefined;