@Override
        public void getConfig(ProtonConfig.Builder builder) {
            if (threads != null) threads.getConfig(builder);
            if (lidSpace != null) lidSpace.getConfig(builder);
            if (strategy != null) strategy.getConfig(builder);
            if (index != null) index.getConfig(builder);
            if (summary != null) summary.getConfig(builder);
            if (initialize != null) initialize.getConfig(builder);
            if (feeding != null) feeding.getConfig(builder);
            if (removedDB != null) removedDB.getConfig(builder);
        }
Class representing the tuning config used for a search cluster.
Take a look at proton.def and vespa doc for detailed explanations.

@author geirst
config-model/src/main/java/com/yahoo/vespa/model/search/Tuning.java