docs: public synchronized void load2() throws IOException {
          COL result = create();
  
          if (exists()) {
              try (LinesStream stream = linesStream()) {
                  for (String line : stream) {
                      if (line.startsWith("#")) continue;   // comment
                      T r = parse(line);
                      if (r != null)
                          result.add(r);
                  }
              }
          }
  
          parsed = readOnly(result);
      }