private void syncFontFamilies(AWTEvent event) {
    Object source = event.getSource();
    if (source instanceof AbstractFontCombo<?> combo) {
      if (combo.isEnabled() && combo.isShowing() && combo.getSelectedItem() != null) {
        syncFontFamilies();
      }
    }
  }
private void syncFontFamilies(AWTEvent event)