Getting attachment tag from ProxmityZone

How would you get the attachments value from a ProximityZone? I am using the following tutorial:
https://developer.estimote.com/proximity/android-tutorial/

Here is the part for ProximityZone:

```
// add this below:
ProximityZone zone = new ProximityZoneBuilder()
    .forTag("desks")
    .inNearRange()
    .onEnter(new Function1<ProximityZoneContext, Unit>() {
        @Override
        public Unit invoke(ProximityZoneContext context) {
            String deskOwner = context.getAttachments().get("desk-owner");
            Log.d("app", "Welcome to " + deskOwner + "'s desk");
            return null;
        }
    })
    .onExit(new Function1<ProximityZoneContext, Unit>() {
        @Override
        public Unit invoke(ProximityZoneContext context) {
            Log.d("app", "Bye bye, come again!");
            return null;
        }
    })
    .build();
```

What I want to do is use the string deskOwner somewhere else, but I’m not sure how to extract that from the ProximityZone zone. Any suggestions?