if (overriddenProp != null) {
                    for (ExtraAttributeDoc attributeDoc : overriddenProp.getAdditionalValues()) {
                        additionalValues.put(attributeDoc.getKey(), attributeDoc);
                    }
                }
            }

            for (int i = 1; i < header.size(); i++) {
                if (cells.get(i).getFirstChild() == null) {
                    continue;