export declare class UrlTools {
    /**
     * Extract hostname from url
     * - https://apiservice.com/ -> apiservice.com
     * - https://api.apiservice.com/ -> api.apiservice.com
     * - https://api.apiservice.com/method?limit=10 -> api.apiservice.com
     *
     * @static
     * @param {string} url URL address
     * @return {string} hostname from url
     * @memberof UrlTools
     */
    static extractHostname(url: string): string;
    /**
     * Extract domain from url
     *
     * - https://apiservice.com/ -> apiservice.com
     * - https://api.apiservice.com/ -> apiservice.com
     * - https://api.apiservice.com/method?limit=10 -> apiservice.com
     *
     * @static
     * @param {string} url URL address
     * @return {string} root domain from url
     * @memberof UrlTools
     */
    static extractRootDomain(url: string): string;
}