interface Identifiable {
    ref: number | string | Element | object;
}
/**
 * Returns a guid for the passed `ref`.
 * The guid is stable, meaning that passing the same `ref` will yield the same guid.
 * If no parameter is passed it will generate the next available guid.
 *
 * @param { any } ref
 */
export declare function uniqueId(_?: any[], { ref }?: {
    ref?: Identifiable;
}): string;
declare const _default: any;
export default _default;