import { ApplicationRef, ComponentFactoryResolver, EventEmitter, ViewContainerRef } from "@angular/core";
import * as i0 from "@angular/core";
export declare class MdlDialogOutletService {
    private appRef;
    private componentFactoryResolver;
    backdropClickEmitter: EventEmitter<void>;
    private viewContainerRefInternal;
    private backdropComponent;
    constructor(appRef: ApplicationRef, componentFactoryResolver: ComponentFactoryResolver);
    get viewContainerRef(): ViewContainerRef | null;
    setDefaultViewContainerRef(vCRef: ViewContainerRef | null): void;
    hideBackdrop(): void;
    showBackdropWithZIndex(zIndex: number): void;
    private setViewContainerRef;
    static ɵfac: i0.ɵɵFactoryDeclaration<MdlDialogOutletService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<MdlDialogOutletService>;
}