@Override
    public PhysicsSpace getPhysicsSpace() {
        return space;
    }
If enabled, add this control's physics object to the specified physics
space. If not enabled, alter where the object would be added. The object
is removed from any other space it's currently in.

@param newSpace where to add, or null to simply remove
jme3-jbullet/src/main/java/com/jme3/bullet/control/CharacterControl.java