import { ApplicationRef, ComponentFactoryResolver, Injector } from '@angular/core';
import { Observable, Subscription } from 'rxjs';
import { OverlayOptions } from './overlay.model';
import * as i0 from "@angular/core";
export declare class OverlayService {
    private document;
    private platformId;
    private injector;
    private appRef;
    private cfResolver;
    private currentId;
    private refs;
    escapeSub: Subscription;
    constructor(document: any, platformId: any, injector: Injector, appRef: ApplicationRef, cfResolver: ComponentFactoryResolver);
    /**
     * showOverlay runs overlay with specified component
     * @param options
     * overlay.model, optional
     */
    createOverlay(options?: OverlayOptions): Observable<any>;
    private escapeListener;
    private onResultKey;
    static ɵfac: i0.ɵɵFactoryDeclaration<OverlayService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<OverlayService>;
}