/**
 * Given a URL containing a route path (first hash) and possibly an anchor (second hash),
 * returns only the anchor part, if it exists. (Does not include the query string, if any.)
 * If `url` has no hash, or only has a single hash (for the route path), returns an empty string.
 * @param url - Full or partial URL. Just the hash section is valid, as long as it's prepended with #.
 */
export declare function extractAnchorLink(url: string): string;