private void handleFlushStrategy(Element spec, Tuning.SearchNode sn) {
        for (Element e : XML.getChildren(spec)) {
            if (equals("native", e)) {
                handleNativeStrategy(e, sn);
            }
        }
    }
Builder for the tuning config for a search cluster.

@author geirst
config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/DomSearchTuningBuilder.java