public function save(string $pathAndFilename, array $configuration)
    {
        $header = '';
        if (file_exists($pathAndFilename . '.yaml')) {
            $header = $this->getHeaderFromFile($pathAndFilename . '.yaml');
        }
        $yaml = Yaml::dump($configuration, 99, 2);
        file_put_contents($pathAndFilename . '.yaml', $header . chr(10) . $yaml);
    }