UpdateEvent & PushOptions are not exported from library

[maciejtreder]

Following lines:

import { NgServiceWorker, UpdateEvent } from '@angular/service-worker';

/*
Some code here
*/

this.sw.checkForUpdate().filter(update => update).subscribe(update => {
            console.log("ws update", update);
            this.sw.updates.subscribe((toInstall: UpdateEvent) => {
                console.log("toInstall", toInstall);
            });
        });

causes compilation issue:

ERROR in /path/to/project/src/app/app.component.ts (4,27): Module '"/path/to/project/node_modules/@angular/service-worker/index"' has no exported member 'UpdateEvent'.