@Override
    public List<T> readValue(Element dataElement) {
      List<T> list = new SmartList<>();
      for (Element element : dataElement.getChildren()) {
        if (NULL_ELEMENT.equals(element.getName())) {
          list.add(null);
        }
        else if (myItemTagName.equals(element.getName())) {
          T item = myItemExternalizer.readValue(element);
          if (item == null) {
            LOG.error("Can't create element " + myItemExternalizer);
            return list;
          }
          list.add(item);
        }
      }
      return list;
    }
@Override
    public List<T> readValue(Element dataElement)