import hyperid from 'hyperid';
/**
 * Generate a (globally) unique identifier in a very fast way.
 * Please note the ids ARE NOT formatted as UUID and have variable length.
 * The format of generated values may change in the future.
 *
 * @internal
 */
export declare const generateUniqueId: hyperid.Instance;
/**
 * A regular expression for testing values generated by generateUniqueId.
 * @internal
 */
export declare const UNIQUE_ID_PATTERN: RegExp;