docs: public void addNotMatched(final String tsuid, final String message) {
      if (tsuid == null || tsuid.isEmpty()) {
        throw new IllegalArgumentException("Empty or null non matches not allowed");
      }
      if (not_matched == null) {
        not_matched = new HashMap<String, String>();
      }
      if (!not_matched.containsKey(tsuid)) {
        not_matched.put(tsuid, message);
        changed.put("not_matched", true);
      }
    }