Clearing a specific input-linked callback?

I think I'm missing something simple with an app I am writing, and my google / ctrl+f skills are failing me.

If I create an event-linked callback, like

Bangle.on('touch', (button, xy) => getTouchedKey(keys, xy, resolve));

Is there some way to clear that callback from triggering on touch? I tried making a call to

Bangle.on('touch', () => {});

but that seems to just add another callback to the event watcher.

Basically I am popping up a keyboard that responds to touch events, but when the keyboard promise resolves I want to return to a previous UI state. Instead I end up with an invisible keyboard over the previous UI.

Happy to either get an answer here or be directed to the appropriate documentation if it's out there!

EDIT: I may have found what I am looking for? In the documentation for Bangle.setUI there's a quote:

While you could use setWatch/etc manually, the benefit here is that you don't end up with multiple setWatch instances,

So maybe I need to just figure out how to do this with setUI and that will resolve my problem.

EDIT: Yes, that did it. I'd like to thank the community for bearing with me while I talk through my problems out loud, :D

For posterity:

Bangle.setUI({
      mode: "custom",
      touch: (button, xy) => getTouchedKey(keys, xy, resolve)
    });
... later...
Bangle.setUI(undefined);