import type { string_url } from '../../../types/string_url';
import type { really_unknown } from '../../organization/really_unknown';
/**
 * Tests if given string is valid URL.
 *
 * Note: [🔂] This function is idempotent.
 * Note: Dataurl are considered perfectly valid.
 * Note: There are few similar functions:
 * - `isValidUrl` *(this one)* which tests any URL
 * - `isValidAgentUrl` which tests just agent URL
 * - `isValidPipelineUrl` which tests just pipeline URL
 *
 * @public exported from `@promptbook/utils`
 */
export declare function isValidUrl(url: really_unknown): url is string_url;
