public String getAllVespaServices() {
        return vespaServices.getVespaServices().stream()
                .map(VespaService::getServiceName)
                .distinct()
                .collect(Collectors.joining(" "));
    }
Returns a space separated list of all distinct service names.
metrics-proxy/src/main/java/ai/vespa/metricsproxy/core/MetricsManager.java