public void postProc(DeployState deployState, TreeConfigProducer<AnyConfigProducer> root, ConfigModelRepo configModelRepo) {
        createDocprocMBusServersAndClients(configModelRepo);
        if (deployState.isHosted()) validateContainerClusterIds(configModelRepo);
    }
Processing that requires access across different plugins

@param root root config producer
@param configModelRepo a {@link ConfigModelRepo}
config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/VespaDomBuilder.java