private function setBootstrapNamespace($oldNamespace, $newNamespace)
    {
        $files = $this->filesystem->files(base_path() . '/bootstrap');

        foreach ($files as $file) {
            $content = $this->filesystem->get($file);
            $this->filesystem->create($file, str_replace($oldNamespace . '\Controllers', $newNamespace . '\Controllers', $content));
        }
    }