import * as i0 from "@angular/core";
export declare class NavigationService {
    private static readonly DEFAULT_FALLBACK_URL;
    private readonly router;
    private readonly location;
    private readonly destroyRef;
    private readonly history;
    constructor();
    back(fallbackUrl?: string): void;
    private listenToNavigationEndEvents;
    private addToHistory;
    static ɵfac: i0.ɵɵFactoryDeclaration<NavigationService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NavigationService>;
}