import { IURLExtended } from './types';
import URLSearchParams from './url-search-params';
/**
 * Wraps URLSearchParams and pushes changes in search string to a parent
 * URL instance.
 */
export default class URLSearchParamsWrapper extends URLSearchParams {
    private url;
    constructor(url: IURLExtended, init: URLSearchParams);
    append(name: string, value: string): void;
    delete(name: string): void;
    set(name: string, value: string): void;
    sort(): void;
}