import { Observable } from "rxjs";
import { DurationUnit } from "../common-types";
import { EventsService } from "./events.service";
import * as i0 from "@angular/core";
export declare class CacheService {
    protected events: EventsService;
    get userChanged(): Observable<any>;
    readonly ignore: Observable<any>;
    readonly permanent: Observable<any>;
    private caches;
    constructor(events: EventsService);
    expiresIn(amount?: number, unit?: DurationUnit): Observable<any>;
    expiresAt(when: Date): Observable<any>;
    use<T>(key: string, valueCb: () => T, expires?: Observable<any>): T;
    static ɵfac: i0.ɵɵFactoryDeclaration<CacheService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<CacheService>;
}