public void refresh(GThemeValueMap currentValues) {
		IconValue value = currentValues.getIcon(id);
		Icon icon = value == null ? null : value.get(currentValues);
		if (icon != null) {
			delegate = icon;
		}
	}
Reloads the delegate.
@param currentValues the map of current theme values
Ghidra/Framework/Gui/src/main/java/generic/theme/GIcon.java