static JScrollPane jWiderScrollPane(final JComponent c) {
  ret swing(func -> JScrollPane { ret new JScrollPane(c) {
    public Dimension getPreferredSize() {
      Component view = getViewport().getView();
      if (view == null) ret super.getPreferredSize();
      int pref_height = view.getPreferredSize().height;
      setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
      Dimension dim = new(super.getPreferredSize().width + getHorizontalScrollBar().getSize().width, pref_height);
      setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
      ret dim;
    }
  }; });
}

Began life as a copy of #1015089