private static void assertReindexingConfiguredOnAdminCluster(VespaModel model) {
        ClusterControllerContainerCluster clusterControllerCluster = model.getAdmin().getClusterControllers();
        assertReindexingMaintainerConfiguredOnClusterController(clusterControllerCluster);
    }
Test for creating cluster controllers under the admin tag.
config-model/src/test/java/com/yahoo/vespa/model/admin/ClusterControllerTestCase.java