public static ImageIcon getDisabledIcon(Icon icon, int brightnessPercent) {
		return new DisabledImageIcon(icon, brightnessPercent);
	}
Returns a disabled icon while allowing the caller to control the brightness of the icon
returned

@param icon The icon to disable.
@param brightnessPercent The level of brightness (0-100, where 100 is the brightest).
@return a disabled version of the original icon.
Ghidra/Framework/Gui/src/main/java/resources/ResourceManager.java