import Primitive from './primitive';
import type { UnknownState } from '../types';
declare class Unknown extends Primitive<unknown, unknown, UnknownState<unknown, unknown>> {
    filter(value: unknown, defaultable: false, quiet: true): boolean;
    filter(value: unknown, defaultable?: boolean, quiet?: false): unknown;
    filter(value: unknown, defaultable?: boolean, quiet?: boolean): unknown | boolean;
    test(value: unknown): value is unknown;
    anyOf(values: unknown[]): Unknown;
    noneOf(values: unknown[]): Unknown;
}
export default Unknown;