import * as i0 from "@angular/core";
export declare class LeftSidebarService {
    private activeMenuSubject;
    activeMenu: import("rxjs").Observable<string>;
    constructor();
    setActiveMenu(menuId: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<LeftSidebarService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<LeftSidebarService>;
}