@Override
        protected StorageCluster doBuild(DeployState deployState, TreeConfigProducer<AnyConfigProducer> ancestor, Element producerSpec) {
            ModelElement clusterElem = new ModelElement(producerSpec);
            return new StorageCluster(ancestor,
                                      ContentCluster.getClusterId(clusterElem),
                                      new FileStorProducer.Builder().build(deployState.getProperties(), clusterElem),
                                      new StorServerProducer.Builder().build(clusterElem),
                                      new StorVisitorProducer.Builder().build(clusterElem),
                                      new PersistenceProducer.Builder().build(clusterElem));
        }
Represents configuration that is common to all storage nodes.
config-model/src/main/java/com/yahoo/vespa/model/content/storagecluster/StorageCluster.java