// params: column index, Comparator, column index, Comparator, ...
svoid rowSorter_setComparatorForAllColumns(JTable table, final Comparator comparator) {
  please include function setTableModel.
  setTableModel_fixSorter.put(table, voidfunc(JTable table, RowSorter sorter) {
    if (sorter cast TableRowSorter) {
      int n = tableColumnCount(table);
      for i to n:
        sorter.setComparator(i, comparator);
    }
  });
}