Resolved How to get notified of snap turn (perhaps other similar events)

Hi,

In the process of migrating to XR toolkit. I previously had a blink effect when the user made a snap turn and now I'm trying to replicate it, I expected to find an action/unity event on the snap turn provider, or somewhere, but I can't find anywhere to hook into to get notified when it happens.

Looking at many posts, I wonder if it's that I need to do something with XRI bindings (but this seems too low level). Then I read mentioned in a post about TrackedPoseDriver, is this what I need?

Thanks for any help.
And generally, can someone point to where I can learn how to use XRI bindings, what they're for? And other topics like the TrackedPoseDriver...

 

I figured out how to do this for anyone looking for a solution:
Get hold of the InputActionReference the controller is using for turning, (eg. XRI LeftHand/Turn), and test its action.triggered bool. I found it works well because it just briefly gets set during update, only when the snap turn is happening.
I probably would prefer to observe some kind of event rather than test this on update, but for now it's working.