I'm attempting to attach a particle emitter to a skeleton, and am having some hiccups. Specifically, I can't seem to attach the GPUParticleEmitter3D to an actual bone, that I can see.

This should still be trivial, but all of the Skeleton functions require a bone's index, and as far as I can tell, I can't get that easily. Can someone help me figure this out, or at least provide a link to some relevant documentation?

The Godot docs have been a little obtuse so far.