export declare namespace UrlUtil {
    /**
     * Returns true if the given arg is an absolute url.
     * @param url URL string to test
     */
    function isAbsolute(url: string): boolean;
    /**
     * Returns true if the given arg is not an absolute url.
     * @param url URL string to test
     */
    function isRelative(url: string): boolean;
    function isAbsoluteUrl(url: string): boolean;
}