import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
/**
 * Service for custom stepper
 */
export declare class TulStepperService {
    /**
     * Subject for actions ('initial' | 'next' | 'previous')
     */
    private display;
    /**
     * Build an observable
     * @returns Observable
     */
    watch(): Observable<'initial' | 'next' | 'previous'>;
    /**
     * Select next step
     */
    next(): void;
    /**
     * Select previous step
     */
    previous(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<TulStepperService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TulStepperService>;
}