private function renameKey()
    {
        try {
            list($file, $key) = explode('.', $this->argument('oldKey'), 2);
        } catch (\ErrorException $e) {
            $this->error('Could not recognize the key you want to rename.');

            return;
        }

        if (Str::contains($this->argument('newKey'), '.')) {
            $this->error('Please provide the new key must not contain a dot.');

            return;
        }

        $newKey = preg_replace('/(\w+)$/i', $this->argument('newKey'), $key);

        $files = $this->manager->files()[$file];

        $currentValues = [];

        foreach ($files as $languageKey => $filePath) {
            $content = Arr::dot($this->manager->getFileContent($filePath));

            $currentValues[$languageKey] = isset($content[$key]) ? $content[$key] : '';
        }

        $this->manager->removeKey($file, $key);

        $this->manager->fillKeys(
            $file,
            [$newKey => $currentValues]
        );
    }