/**
 * Return a stable favicon URL for a result URL. Backed by Google's free
 * `s2/favicons` service so we don't have to fetch the source page just to
 * read a `<link rel="icon">`. Results cached per-host within the process.
 */
export declare function faviconUrlFor(resultUrl: string): string | undefined;
export declare function _resetFaviconCacheForTest(): void;
//# sourceMappingURL=favicon.d.ts.map