import { OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class LoadingIndicatorService implements OnDestroy {
    isLoading$: Observable<boolean>;
    private readonly loading$;
    private readonly _attachedLoadingSubscription;
    constructor();
    attachLoading(loading$: Observable<any>): void;
    ngOnDestroy(): void;
    disable(): void;
    enable(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<LoadingIndicatorService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<LoadingIndicatorService>;
}