import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class DataService {
    constructor();
    private dataSubject;
    apiUrl$: Observable<string>;
    private headerSubject;
    header$: Observable<any>;
    private subformSubject;
    subform$: Observable<any>;
    private parentQuestionsSubject;
    parentQuestions$: Observable<any>;
    setApiUrl(data: string): void;
    setHeader(data: any): void;
    setParentQuestions(data: any): void;
    setSubformData(data: any): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DataService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DataService>;
}