public List<ModelElement> children(String name) {
        List<Element> e = XML.getChildren(xml, name);

        List<ModelElement> list = new ArrayList<>();
        e.forEach(element -> list.add(new ModelElement(element)));
        return list;
    }
If not found, return empty list.
config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/ModelElement.java