@Override
        protected Distributor doBuild(DeployState deployState, TreeConfigProducer<Distributor> ancestor, Element producerSpec) {
            return new Distributor(deployState.getProperties(), (DistributorCluster)ancestor, new ModelElement(producerSpec).integerAttribute("distribution-key"),
                                   clusterXml.integerAttribute("distributor-base-port"), persistenceProvider);
        }
Represents specific configuration for a given distributor node.
config-model/src/main/java/com/yahoo/vespa/model/content/Distributor.java