message: docs: int type in Util::spo_cmp remains to be solved
diff: @@ -1636,6 +1636,7 @@ Util::node2string(const char* _raw_str) {
  return _output;
  }
  +//TODO: change these compare functions from int to unsigned, but take care of the returned values
  int
  Util::_spo_cmp(const void* _a, const void* _b)
  {
  