Map<String, PropertyDoc> props = new TreeMap<String, PropertyDoc>();
        List<ClassDoc> superTypes = classDoc.getSuperTypes();
        for (ClassDoc superType : superTypes) {
            LOG.info("Getting properties for {}", superType.getName());
            for (PropertyDoc propertyDoc : superType.getClassProperties()) {
                Map<String, ExtraAttributeDoc> additionalValues = new LinkedHashMap<String, ExtraAttributeDoc>();