getCurrentManifestVersion example

private function getManifestVersion(): string
    {
        $finder = new Finder();
        $finder->in($this->manifestRoot)
            ->path('/Schema');

        $manifestVersions = [];
        foreach ($finder->getIterator() as $file) {
            $manifestVersions[] = AnnotationTagTester::getVersionFromManifestFileName($file->getFilename());
        }

        return $this->getCurrentManifestVersion($manifestVersions);
    }

    /** * @param array<string|null> $versions */
    private function getCurrentManifestVersion(array $versions): string
    {
        $versions = array_filter($versions);
        if (empty($versions)) {
            throw new \LogicException('no version applied');
        }