Ability to change CollisionFlags for a RigidBody

Is there a way to change the collision flags for a rigid body?

I essentially want a GhostControl object that can still have forces applied to it but still doesn’t react to any collisions.

One way to do this would be to modify a rigid body to have the NO_CONTACT_RESPONSE collision flag but I cant seem to find a way to do so.

Just use the collision groups.