src/Components/Cache/Cache.php
protected function finish($output = null)
    {
        if (! is_null($output)) {
            $file = fopen($this->file, 'w+');
            fwrite($file, $output);
            fclose($file);
            return $output;
        }

        return false;
    }
protected function finish($output = null)
    {
        if (! is_null($output)) {
            $file = fopen($this->file, 'w+');
            fwrite($file, $output);
            fclose($file);
            return $output;
        }

        return false;
    }
Finish cache and save file

@param string $output

@return mixed