static int withMargin_defaultWidth = 6;

static JPanel withMargin(Component c) {
  ret withMargin(withMargin_defaultWidth, c);
}

static JPanel withMargin(int w, Component c) {
  ret withMargin(w, w, c);
}

static JPanel withMargin(int w, int h, Component c) {
  ret withMargin(w, h, w, h, c);
}

static JPanel withMargin(final int top, final int left, final int bottom, final int right, final Component c) {
  ret swing(func -> JPanel {
    JPanel p = marginPanel();
    p.setBorder(BorderFactory.createEmptyBorder(top, left, bottom, right));
    p.add(c);
    ret p;
  });
}