How to use "bgfx" namespace?

https://docs.unity3d.com/Packages/com.unity.tiny.rendering@0.29/api/Bgfx.bgfx.html
https://forum.unity.com/threads/rendering-declare-referenced-shader-assets.845875/#post-5584411

A slightly older version of the docs has a bgfx namespace, and if you search for older posts you'll see code that uses the bgfx namespace, but even if you use bgfx in your sample project, the namespace still exists. No.
How can I use the bgfx namespace?

 

With Tiny you need to stop double-clicking your scripts to open and instead use the menu item "Assets/Open DOTS C# Solution" instead (not the "Open C# Project" one!). If you do that, the opened solution will have the correct intellisense for you

(screenshot taken from the latest version btw)

 

Thanks!