@Override
	protected ImageIcon createImageIcon() {
		Image image = createImage();
		Image disabledImage = ImageUtils.createDisabledImage(image, brightnessPercent);
		return new ImageIcon(disabledImage, getFilename());
	}
Construct wrapped disabled ImageIcon based upon specified baseIcon
using the specified brightness level
@param baseIcon the icon to create a disabled version of
@param brightnessPercent a brightness level specified using a 
value in the range of 0 thru 100.
Ghidra/Framework/Gui/src/main/java/resources/icons/DisabledImageIcon.java