@Override
    public K8sHost removeHost(IpAddress hostIp) {
        checkArgument(hostIp != null, ERR_NULL_HOST_IP);

        K8sHost host = hostStore.removeHost(hostIp);
        log.info(String.format(MSG_HOST, hostIp.toString(), MSG_REMOVED));

        return host;
    }
@Test(expected = IllegalArgumentException.class)
    public void testRemoveNullHost() {
        target.removeHost(null);
    }