import * as i0 from "@angular/core";
export declare class TopMenuService {
    private $isTopMenuVisible;
    private $isTopMenuHidden;
    readonly isTopMenuVisible: import("rxjs").Observable<boolean>;
    readonly isTopMenuHidden: import("rxjs").Observable<boolean>;
    readonly visibilityChanged: (event: Event) => void;
    static ɵfac: i0.ɵɵFactoryDeclaration<TopMenuService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TopMenuService>;
}