How to achieve inverse kinematics for DAZ Studio models?

[system]

	Attention	Topic was automatically imported from the old Question2Answer platform.
	Asked By	Peter Boughton

I have exported a model as Collada from DAZ Studio, and Godot imports it with a skeleton.
But programmatically moving the hand bone does not result in the whole arm moving.

Godot 3.1 api docs mention a SkeletonIK class that isn’t present in 3.0 docs.

SkeletonIK — Godot Engine (3.1) documentation in English

But that API reference is all there is - there’s no documentation on how to use it.

There are two pages for skeletons and inverse kinematics in the 3.0 docs:

Working with 3D skeletons — Godot Engine (3.0) documentation in English

Inverse kinematics — Godot Engine (3.0) documentation in English

But the links to the “latest version” of those fail to load (browser redirect loop).

Any ideas?