private static @Nullable String getSubTagText(DomElement element, @SuppressWarnings("SameParameterValue") String subTagName) {
    DomFixedChildDescription subTagDescription = element.getGenericInfo().getFixedChildDescription(subTagName);
    if (subTagDescription == null) {
      return null;
    }
    return StreamEx.of(subTagDescription.getValues(element))
      .select(ExtensionDomExtender.SimpleTagValue.class)
      .map(ExtensionDomExtender.SimpleTagValue::getStringValue)
      .findAny()
      .orElse(null);
  }
private static @Nullable String getSubTagText(DomElement element, @SuppressWarnings("SameParameterValue") String subTagName)