static JPanel withSideMargins(Component c) {
  ret withLeftAndRightMargin(c);
}



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



static JPanel withSideMargins(int w1, int w2, Component c) {
  ret withLeftAndRightMargin(w1, w2, c);
}