public List<Substring> getTagArguments(String... tagNames) {
    final List<Substring> result = new ArrayList<>();
    for (String tagName : tagNames) {
      final Map<Substring, Substring> map = myArgTagValues.get(tagName);
      if (map != null) {
        result.addAll(map.keySet());
      }
    }
    return result;
  }
public List<Substring> getTagArguments(String... tagNames)