srecord noeq CenteredComboBoxRenderer<A>(ListCellRenderer<A> baseRenderer) is ListCellRenderer<A> {
  public Component getListCellRendererComponent(JList list, A value, int index, bool isSelected, bool cellHasFocus) {
    var c = baseRenderer.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
    if (c cast JLabel && index < 0)
      centerLabel(c);
    ret c;
  }
}