@Override
		protected void doPaint( Graphics2D g, Object component, int width, int height ) {
			super.doPaint( g, component, width, height );

			float h = scale( 1f );
			g.setColor( borderColor );
			g.fill( new Rectangle2D.Float( 0, height - h, width, h ) );
		}
Provides the Flat LaF UI delegate for {@link org.jdesktop.swingx.JXTitledPanel}.

@author Karl Tauber
flatlaf-swingx/src/main/java/com/formdev/flatlaf/swingx/ui/FlatTitledPanelUI.java