How to - SteamVR 2.0 change action sets and change binding names and bind

[wirelessdreamer]

With VIU and SteamVR 2.0 how do we: 1 - change the active action set

2 - match names of Vive input utility custom action binding names to SteamVR input names

3 - basic input workflow using SteamVR 2.0 with vive input utility

4 - an example action set with viu_touch_xx, viu_press_xx, etc is provided, what we need is to know how to map things like default GrabPinch to BindingRole.GrabPinch in code.