/**
 * Is the given URL the same origin as the current window?
 * Used to determine if we need to do any additional cross-origin
 * handling for the request.
 * @param url
 * @param win - optional window object to use for origin comparison
 *             (useful for testing)
 * @returns
 */
export declare function isSameOrigin(url: string, win?: Window | undefined): boolean;