docs: @Override
    final protected void addRange(int left, int right, int additionalId,
        long additionalRef, Integer id, Long ref) {
      String key = left + "_" + right;
      if (index.containsKey(key)) {
        index.get(key).addIdAndRef(id, ref, additionalId, additionalRef);
      } else {
        root = addRange(root, left, right, additionalId, additionalRef, id, ref);
        root.color = MtasRBTreeNode.BLACK;
      }
    }