import { NgZone, RendererFactory2 } from '@angular/core';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class SimpleActivityDetectionService {
    private ngZone;
    private rendererFactory;
    private renderer;
    private resetTimer$;
    constructor(ngZone: NgZone, rendererFactory: RendererFactory2);
    resetInactivityListener(): void;
    startInactivityListener(inactivityDuration: number, callback: () => void): Observable<void>;
    stopInactivityListener(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SimpleActivityDetectionService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SimpleActivityDetectionService>;
}