public Collection<StorDistributionConfig.Group.Builder> getGroupStructureConfig() {
        List<StorDistributionConfig.Group.Builder> groups = new ArrayList<>();

        StorDistributionConfig.Group.Builder myGroup = new StorDistributionConfig.Group.Builder();
        getConfig(myGroup);
        groups.add(myGroup);

        for (StorageGroup g : subgroups) {
            groups.addAll(g.getGroupStructureConfig());
        }

        return groups;
    }
Returns all the nodes below this group
config-model/src/main/java/com/yahoo/vespa/model/content/StorageGroup.java