Question Change FontAsset with Script?

Is it possible to change the FontAsset of a TextMeshPro object, within a script?

If so, how?

Here's the class that seems to need to be accessed to be modified, but I can't figure out how to get at it:

https://docs.unity3d.com/Packages/com.unity.textmeshpro@2.1/api/TMPro.TMP_FontAsset.html