private function ssVersion()
    {
        // Remove colons so they don't screw with YAML parsing
        $versionSapphire = str_replace(':', '', singleton(SapphireInfo::class)->Version());
        $versionLeftMain = str_replace(':', '', singleton(LeftAndMain::class)->CMSVersion());
        if ($versionSapphire != _t('SilverStripe\\Admin\\LeftAndMain.VersionUnknown', 'Unknown')) {
            return $versionSapphire;
        }
        return $versionLeftMain;
    }