private static DarkModeSetting getAppTheme(final @NonNull Context context) {
        return DarkModeSetting.valueOf(getString(R.string.pref_theme_setting, getBoolean(R.string.old_pref_skin, false) ?
                DarkModeSetting.LIGHT.getPreferenceValue(context) : DarkModeSetting.DARK.getPreferenceValue(context)));
    }
which variants are enabled for UnifiedMap
main/src/main/java/cgeo/geocaching/settings/Settings.java