import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class WaViewportService extends Observable<VisualViewport> {
    private readonly visualViewport;
    private readonly stream$;
    constructor();
    static ɵfac: i0.ɵɵFactoryDeclaration<WaViewportService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<WaViewportService>;
}