Access angular NgZone instance from window.object

Is it possible to access angular(2+) ZoneJS instance (NgZone) without injecting it inside constructor like this:

...

 const zone = window['<angular zonejs path in window object>']
...

For now when I developing my angular library I need to do this:

class Test {
 constructor( zone: NgZone ) { initmyplugin(zone); }
}

But I don't wanna user to care about initialization of NgZone.