/**
 * Generates a unique identifier.
 *
 * If a `prefix` is provided, the resulting identifier will start with the prefix.
 *
 * @param prefix - An optional prefix for the identifier.
 * @returns A unique identifier.
 */
declare function uniqueId<Prefix extends string>(prefix: Prefix): `${Prefix}${string}`;
declare function uniqueId(prefix?: string): string;

export { uniqueId as u };