static JTable dataToTable(O data) {
    ret dataToTable(showTable(), data);
  }
  
  static JTable dataToTable(O data, S title) {
    ret dataToTable(showTable(title), data);
  }
  
  static JTable dataToTable(JTable table, O data) {
    ret dataToTable(table, data, false);
  }
  
  static JTable dataToTable(JTable table, O data, bool now) {
    new L<L<S>> rows;
    new L<S> cols;

    if (data instanceof L) {
      for (O x : (L) data) pcall {
        rows.add(dataToTable_makeRow(x, cols));
      }
    } else if (data instanceof Map) {
      Map map = cast data;
      for (O key : map.keySet()) {
        O value = map.get(key);
        rows.add(litlist(structureOrText(key), structureOrText(value)));
      }
    } else
      print("Unknown data type: " + data);

    if (now)
      table.setModel(fillTableWithStrings_makeModel(rows, toStringArray(cols)));
    else
      fillTableWithStrings(table, rows, cols);
    ret table;
  }

Began life as a copy of #1001613