private void doInitialize() {
		initializeSystemValues();
		buildCurrentValues();
		GColor.refreshAll(currentValues);
		GIcon.refreshAll(currentValues);
	}
This is a strange implementation of {@link ThemeManager} that is meant to be used in a headless
environment, but also needs theme properties to have been loaded.  This is needed by any
application that needs to do theme property validation.
Ghidra/Framework/Gui/src/main/java/generic/theme/HeadlessThemeManager.java