import { type FormPage } from '../../types';
declare class PageObserver {
    private scrollablePagesSubject;
    private pagesWithErrorsSubject;
    private activePagesSubject;
    private evaluatedPagesVisibilitySubject;
    setEvaluatedPagesVisibility(evaluatedPagesVisibility: boolean): void;
    updateScrollablePages(newPages: Array<FormPage>): void;
    updatePagesWithErrors(newErrors: string[]): void;
    addActivePage(pageId: string): void;
    removeInactivePage(pageId: string): void;
    getActivePagesObservable(): import("rxjs").Observable<Set<string>>;
    getScrollablePagesObservable(): import("rxjs").Observable<FormPage[]>;
    getPagesWithErrorsObservable(): import("rxjs").Observable<Set<string>>;
    getEvaluatedPagesVisibilityObservable(): import("rxjs").Observable<boolean>;
    clear(): void;
}
export declare const pageObserver: PageObserver;
export {};
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