protected function getConfigurationFiles($directoryPath)
    {
        $files = [];

        if (is_dir($directoryPath)) {
            foreach (Finder::create()->files()->in($directoryPath) as $file) {
                $group = basename($file->getRealPath(), '.php');
                $files[$group] = $file->getRealPath();
            }
        }

        return $files;
    }