public static boolean isContent(ServiceCluster cluster) {
        return isContent(cluster.serviceType());
    }
@Test
    public void verifyContentClusterIsRecognized() {
        ServiceCluster cluster = createServiceCluster(ServiceType.DISTRIBUTOR);
        assertTrue(VespaModelUtil.isContent(cluster));
        cluster = createServiceCluster(ServiceType.STORAGE);
        assertTrue(VespaModelUtil.isContent(cluster));
        cluster = createServiceCluster(ServiceType.SEARCH);
        assertTrue(VespaModelUtil.isContent(cluster));
    }