private static void add(Insets destInsets, Insets insetsToAdd) {
      destInsets.top += insetsToAdd.top;
      destInsets.bottom += insetsToAdd.bottom;
      destInsets.left += insetsToAdd.left;
      destInsets.right += insetsToAdd.right;
    }
private static void add(Insets destInsets, Insets insetsToAdd)