public ClusterState getNewestSystemStateSent() {
        if (clusterStateVersionBundleSent.isEmpty()) {
            return null;
        }
        return clusterStateVersionBundleSent.lastEntry().getValue().getBaselineClusterState();
    }
Sets the wanted state. The wanted state is taken as UP if a null argument is given
clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/NodeInfo.java