import { ApplicationRef, NgZone } from "@angular/core";
import { BehaviorSubject } from "rxjs";
export declare class PrebootService {
    private appRef;
    private platformId;
    private zone;
    private isBrowser;
    private isComplete;
    private isStable;
    transitionComplete: BehaviorSubject<boolean>;
    constructor(appRef: ApplicationRef, platformId: any, zone: NgZone);
    private transitionToClient;
    forceTransitionComplete(delay: number): void;
}