15     private $filename;  variable in GuzzleHttp\\Cookie\\FileCookieJar
34         $this->filename = $cookieFile;
47         $this->save($this->filename);
53      * @param string $filename File to save
57     public function save(string $filename): void  argument
68         if (false === \file_put_contents($filename, $jsonStr, \LOCK_EX)) {
69             throw new \RuntimeException("Unable to save file {$filename}");
78      * @param string $filename Cookie file to load.
82     public function load(string $filename): void  argument
84         $json = \file_get_contents($filename);
86             throw new \RuntimeException("Unable to load file {$filename}");
98             throw new \RuntimeException("Invalid cookie file: {$filename}");