public static boolean isClusterController(ServiceCluster cluster) {
        return ServiceType.CLUSTER_CONTROLLER.equals(cluster.serviceType());
    }
Utility methods for working with Vespa-specific model entities (see OrchestratorUtil
for more generic model utilities).

@author hakonhall
orchestrator/src/main/java/com/yahoo/vespa/orchestrator/model/VespaModelUtil.java