private Image createImage(Icon icon) {

		if (sortImage != null) {
			return sortImage;
		}

		int w = icon.getIconWidth();
		int h = icon.getIconHeight();

		BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
		Graphics2D g2d = (Graphics2D) bi.getGraphics();
		g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

		icon.paintIcon(this, g2d, 0, 0);

		g2d.dispose();

		sortImage = bi;
		return bi;
	}
Sets the an emphasis value for this column that is used to slightly enlarge and call out the
sort for the column.  
@param sortEmphasis the emphasis value
Ghidra/Framework/Docking/src/main/java/docking/widgets/table/GTableHeaderRenderer.java