static JFrame showSideBySide(Component c1, Component c2) {
  ret showSideBySide(programTitle(), c1, c2);
}

static JFrame showSideBySide(S title, Component c1, Component c2) {
  JFrame frame = showFrame(title);
  frame.getContentPane().setLayout(new GridLayout(1, 2));
  frame.getContentPane().add(wrap(c1));
  frame.getContentPane().add(wrap(c2));
  swingUpdate(frame);
  ret frame;
}