private function getDefaultValue($missingKey)
    {
        if (! $this->option('default')) {
            return null;
        }

        try {
            $missingKey = explode(':', $missingKey)[0];

            list($file, $key) = explode('.', $missingKey);

            $filePath = $this->manager->files()[$file][config('app.locale')];

            return config('app.locale').":{$this->manager->getFileContent($filePath)[$key]}";
        } catch (\Exception $e) {
            return null;
        }
    }