def delete_virtualip(self, loadbalancer, vip):
        """Deletes the VirtualIP from its load balancer."""
        lb = vip.parent
        if not lb:
            raise exc.UnattachedVirtualIP("No parent Load Balancer for this "
                    "VirtualIP could be determined.")
        resp, body = self.api.method_delete("/loadbalancers/%s/virtualips/%s" %
                (lb.id, vip.id))
        return resp, body
Deletes the VirtualIP from its load balancer.