private function defaultConfiguration() : string
    {
        $supportedFiles = [
            'larastan.neon',
            'phpstan.neon',
            'phpstan.neon.dist',
        ];

        foreach ($supportedFiles as $file) {
            $filePath = base_path($file);

            if (file_exists($filePath)) {
                return $filePath;
            }
        }

        return __DIR__.'/../../extension.neon';
    }