import { OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class RxResizeObserver implements OnDestroy {
    private resizeObserver;
    /** @internal */
    private readonly viewsResized$;
    observeElement(element: Element, options?: ResizeObserverOptions): Observable<ResizeObserverEntry>;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<RxResizeObserver, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<RxResizeObserver>;
}