private List<Slobrok> getSlobroks(DeployState deployState, TreeConfigProducer<AnyConfigProducer> parent, Element slobroksE) {
        List<Slobrok> slobroks = new ArrayList<>();
        if (slobroksE != null)
            slobroks = getExplicitSlobrokSetup(deployState, parent, slobroksE);
        return slobroks;
    }
Fallback when no config server is specified
config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/DomAdminV2Builder.java