import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class MarkControlService {
    private _touched;
    get touchedChange(): Observable<void>;
    markAsTouched(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MarkControlService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<MarkControlService>;
}