import { BaseError } from 'make-error';
import { Constrained } from '../../core';
export declare class InvalidUUIDV4Error extends BaseError {
    constructor();
}
export declare const uuidv4Symbol: unique symbol;
export type UUIDV4 = Constrained<typeof uuidv4Symbol, string>;
export declare function isUUIDV4(input: unknown): input is UUIDV4;
export declare function uuidv4(input: unknown): UUIDV4;