import { BehaviorSubject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class HelpCenterService {
    items: BehaviorSubject<HelpCenterItem[]>;
    registerItem(item: HelpCenterItem): void;
    unregisterItem(item: HelpCenterItem): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<HelpCenterService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<HelpCenterService>;
}
export interface HelpCenterItem {
    icon?: string;
    title: string;
    select?: () => void;
}