public PhysicsRigidBody getBodyA() {
        return nodeA;
    }
toggles collisions between linked bodies<br>
joint has to be removed from and added to PhysicsSpace to apply this.
@param collisionBetweenLinkedBodies set to false to have no collisions between linked bodies
jme3-jbullet/src/main/java/com/jme3/bullet/joints/PhysicsJoint.java