public int getType() {
        return type;
    }
used by event factory, called when event reused

@param type the desired type
@param source the desired first object (alias created)
@param nodeB the desired 2nd object (alias created)
@param cp the desired manifold (alias created)
jme3-jbullet/src/main/java/com/jme3/bullet/collision/PhysicsCollisionEvent.java