import { NgZone, RendererFactory2 } from '@angular/core';
import { Observable } from 'rxjs';
export declare class NzResizeService {
    private ngZone;
    private rendererFactory2;
    private readonly resizeSource$;
    private listeners;
    private renderer;
    private disposeHandle;
    private handler;
    constructor(ngZone: NgZone, rendererFactory2: RendererFactory2);
    subscribe(): Observable<void>;
    unsubscribe(): void;
    private registerListener;
    private unregisterListener;
}