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