public void readConfigModels(DeployState deployState,
                                 VespaModel vespaModel,
                                 VespaModelBuilder builder,
                                 ApplicationConfigProducerRoot root,
                                 ConfigModelRegistry configModelRegistry) throws IOException {
        Element userServicesElement = getServicesFromApp(deployState.getApplicationPackage());
        readConfigModels(root, userServicesElement, deployState, vespaModel, configModelRegistry);
        builder.postProc(deployState, root, this);
    }
Initialize part 1.: Reads the config models used in the application package.
config-model/src/main/java/com/yahoo/config/model/ConfigModelRepo.java