private int layoutButtonVertical( JButton button, int hu, int x, int y, int w ) {
			if( button.isVisible() ) {
				int h = scale( hu );
				y -= h;
				button.setBounds( x, y, w, h );
			}
			return y;
		}
Actually does nearly the same as super.paintContentBorder() but
  - not invoking paintContentBorder*Edge() methods
  - repaint selection
flatlaf-jide-oss/src/main/java/com/formdev/flatlaf/jideoss/ui/FlatJideTabbedPaneUI.java