code: @Override
    void scan(EnvKelp query, Object []values, RowCursor cursor)
    {
      try (InputStream is = cursor.openInputStream(getColumn().index())) {
        if (is == null) {
          return;
        }
  
        _serializer.query(is, _query, values);
      } catch (IOException e) {
        log.log(Level.FINER, e.toString(), e);
      }
    }
docs: /*
  @Override
  public PathMapHessian pathMap()
  {
  return _pathMap;
  }