import { Subject } from 'rxjs';
import { KngxNavbarLayer, KngxNavbarLayerEvent } from '../interfaces';
import { KngxNavbarLayerInstance } from '../helpers';
import * as i0 from "@angular/core";
export declare class KngxNavbarService {
    private layers;
    readonly layers$: import("rxjs").Observable<KngxNavbarLayer[]>;
    readonly events: Subject<KngxNavbarLayerEvent<unknown>>;
    readonly events$: import("rxjs").Observable<KngxNavbarLayerEvent<unknown>>;
    idx: number;
    readonly title$: import("rxjs").Observable<{
        id: number;
        value: string | undefined;
    } | null>;
    readonly button$: import("rxjs").Observable<{
        id: number;
        value: string | undefined;
    } | null>;
    readonly theme$: import("rxjs").Observable<{
        id: number;
        value: {
            color: string;
            background: string;
        } | undefined;
    } | null>;
    releaseLayer(id: number): void;
    registerNavbarLayer<T extends Omit<KngxNavbarLayer, 'id'>>(props: T): KngxNavbarLayerInstance<T & {
        id: number;
    }>;
    static ɵfac: i0.ɵɵFactoryDeclaration<KngxNavbarService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<KngxNavbarService>;
}