public function replaceAndSave($oldFile, $search, $replace, $newFile = null)
    {
        if (!isset($newFile) || $newFile == null) {
            $newFile = $oldFile;
        }
        $file = $this->filesystem->get($oldFile);
        $replacing = str_replace($search, $replace, $file);
        $this->filesystem->put($newFile, $replacing);
    }