import { IZSort } from './sort.mjs';
/**
 * An object that can serialize an {@link IZSort} list to a string.
 */
export declare class ZSortSerialize {
    /**
     * Serializes a sort list to a string.
     *
     * @param candidate -
     *        The sort list to serialize.
     *
     * @returns
     *        The string representation of the sort.  Returns undefined
     *        if the list is empty, null, or undefined.
     */
    serialize(candidate: IZSort[] | null | undefined): string | undefined;
}