import javax.swing.border.*;

static JPanel jSection(final LiveValue<S> lv, final Component c) {
  ret swing(func -> JPanel {
    final JPanel panel = new SingleComponentPanel(c);
    lv.onChangeAndNow(r {
      panel.setBorder(BorderFactory.createTitledBorder(
        BorderFactory.createBevelBorder(BevelBorder.LOWERED), lv!))
    });
    ret panel;
  });
}