/**
 * Given a valid http(s) URL, the host for the given URL
 * is returned.
 *
 * @param url {string} URL to extract the host from
 * @returns {string} host of given URL or throws
 */
export declare function getHostFromUrl(url: string): string;
/**
 * Extract host:port from URL
 * @param url URL string
 * @returns host:port string or throws if invalid
 */
export declare function getHostWithPortFromUrl(url: string): string;
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