Calculate inertia tensor rotation

Hi

I’m trying to do this:
http://digitalopus.ca/site/pd-controllers/
(the part “Torque Needed to Achieve a Desired Rotation”).
The code their is supposed for the Unity engine. I can translate almost everything into jme3/jbullet code - except this “rigidbody.inertiaTensorRotation”. I wasn’t able to find any method on RigidBodyControl that gives me that. Maybe it is called differently in jbullet? Can I compute this somehow? I tried googling, but was unable to find anything useful.