public static boolean isStorage(ServiceCluster cluster) {
        return ServiceType.STORAGE.equals(cluster.serviceType());
    }
@Test
    public void verifyStorageClusterIsRecognized() {
        ServiceCluster cluster = createServiceCluster(ServiceType.STORAGE);
        assertTrue(VespaModelUtil.isStorage(cluster));
        cluster = createServiceCluster(ServiceType.STORAGE);
        assertTrue(VespaModelUtil.isStorage(cluster));
    }