public function getVersion()
    {
        $modules = $this->getModules();
        $lockModules = $this->getModuleVersionFromComposer(array_keys($modules));
        $output = [];
        foreach ($modules as $module => $title) {
            $version = isset($lockModules[$module])
                ? $lockModules[$module]
                : _t(__CLASS__ . '.VERSIONUNKNOWN', 'Unknown');
            $output[] = $title . ': ' . $version;
        }
        return implode(', ', $output);
    }