@Override
	public void paint( Graphics g, JComponent c ) {
		super.paint( g, c );

		paintButtonGroup( g );
	}
Does the same as super.navigateFocusedComp() with the exception that components
with empty input map (e.g. JLabel) are skipped.
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolBarUI.java