public static function get($dir)
    {
        $version_file = DIR_CORE_UPDATES . "/{$dir}/" . DIRNAME_CORE . '/config/concrete.php';

        $concrete = @include $version_file;
        if ($concrete['version'] != false) {
            $obj = new self();
            $obj->version = $concrete['version'];
            $obj->identifier = $dir;

            return $obj;
        }
    }