import { Injector } from '@angular/core';
import { RouterService } from '../interfaces/router-service';
import { Observable } from 'rxjs';
import { RouteObserverWatcher } from './observe-route.service';
import { UrlParserService } from './url-parser.service';
export declare class ObserveRouteLeaveService {
    readonly router: RouterService;
    private urlService;
    private injector;
    private urlHistory;
    private queryParamsHistory;
    private get previousUrl();
    private get previousQueryParams();
    private get notFirstRoute();
    constructor(router: RouterService, urlService: UrlParserService, injector: Injector);
    watch({ url, callback, queryParams, base }: RouteObserverWatcher): Observable<any>;
}