/**
 * A URL matches about:blank if its scheme is "about", its path contains a single string
 * "blank", its username and password are the empty string, and its host is null.
 * https://html.spec.whatwg.org/multipage/urls-and-fetching.html#matches-about:blank
 * @param {string} url
 * @return {boolean}
 */
export declare function urlMatchesAboutBlank(url: string): boolean;