private void loadThemes() {
		if (allThemes == null) {
			Set<GTheme> set = new HashSet<>();
			set.addAll(findDiscoverableThemes());
			set.addAll(loadThemeFiles());
			allThemes = set;
		}
	}
Sets the map of Java default UI values. These are the UI values defined by the current Java
Look and Feel.
@param map the default theme values defined by the {@link LookAndFeel}
Ghidra/Framework/Gui/src/main/java/generic/theme/ApplicationThemeManager.java