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);
}

// "now" is ignored now
static JTable dataToTable(JTable table, O data, bool now) {
  new L<L> rows;
  LS cols = new ContentsIndexedList;

  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(structureOrTextForUser(key), structureOrTextForUser(value)));
    }
  } else if (data != null)
    print("Unknown data type: " + data);

  fillTableWithData(table, rows, cols);
  ret table;
}