public static int getBorderFocusAndLineWidth( JComponent c ) {
		FlatBorder border = getOutsideFlatBorder( c );
		return (border != null)
			? Math.round( UIScale.scale( (float) border.getFocusWidth( c ) )
				+ UIScale.scale( (float) border.getLineWidth( c ) ) )
			: 0;
	}
Returns the scaled thickness of the border.
This includes the outer focus border and the actual component border.

@since 2
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatUIUtils.java