import { CanDeactivate } from '@angular/router';
import { Observable } from 'rxjs';
import { UnsavedChangesDialogData } from './unsaved-changes-dialog.model';
import * as i0 from "@angular/core";
/**
 * Guard responsible for protecting leaving page with unsaved changes.
 */
export declare class UnsavedChangesGuard implements CanDeactivate<any> {
    private readonly dialog;
    private readonly authenticationService;
    private readonly authGuardBaseService;
    unsaved: boolean;
    data: UnsavedChangesDialogData;
    /**
     * Allows to deactivate route when there is no unsaved changes, otherwise displays dialog to confirm discarding changes.
     *
     * @returns boolean | Observable<boolean> true when there is no unsaved changes or changes can be discarded, false otherwise.
     */
    canDeactivate(): boolean | Observable<boolean>;
    static ɵfac: i0.ɵɵFactoryDeclaration<UnsavedChangesGuard, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<UnsavedChangesGuard>;
}