How do you fix the Spline IK dependency issue in 2.8?

I’ve tried making an Spline IK rig in 2.8 but I don’t think the dependency issues on that matter hasn’t been fixed.

In 2.79 Relations Extras options where present as a work around for this but I can’t seem to find it anywhere.

Unless I’m doing something wrong, is there a way to make it work correctly in 2.8?