docs: public static SimpleDataSet read(Path path, char delimiter, int lines_to_skip, char comment, Set<Integer> cat_cols) throws IOException
      {
          BufferedReader br = Files.newBufferedReader(path, Charset.defaultCharset());
          SimpleDataSet ret = read(br, delimiter, lines_to_skip, comment, cat_cols);
          br.close();
          return ret;
      }