import { ComponentRef, OnDestroy } from '@angular/core';
import * as i0 from "@angular/core";
export declare class ComponentsRegistryService implements OnDestroy {
    private parentComponentsRegistryService;
    private _componentsReady$;
    componentsReady$: import("rxjs").Observable<ComponentRef<any>[]>;
    private count;
    private childComponents;
    private subChildComponents;
    constructor(parentComponentsRegistryService: ComponentsRegistryService);
    ngOnDestroy(): void;
    waitFor(count: number): void;
    add(compRef: ComponentRef<any>): void;
    addChildren(compRefs: ComponentRef<any>[]): void;
    addChild(compRef: ComponentRef<any> | null | undefined): void;
    addSubChildren(compRefs: ComponentRef<any>[]): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<ComponentsRegistryService, [{ optional: true; skipSelf: true; }]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ComponentsRegistryService>;
}