38     private $fetcher;  variable in Google\\Auth\\FetchAuthTokenCache
41      * @param FetchAuthTokenInterface $fetcher A credentials fetcher
46         FetchAuthTokenInterface $fetcher,  argument
50         $this->fetcher = $fetcher;
74         $auth_token = $this->fetcher->fetchAuthToken($httpHandler);
86         return $this->getFullCacheKey($this->fetcher->getCacheKey());
94         return $this->fetcher->getLastReceivedToken();
105         if (!$this->fetcher instanceof SignBlobInterface) {
112         return $this->fetcher->getClientName($httpHandler);
128         if (!$this->fetcher instanceof SignBlobInterface) {
137         if ($this->fetcher instanceof Credentials\GCECredentials) {
140             return $this->fetcher->signBlob($stringToSign, $forceOpenSsl, $accessToken);
143         return $this->fetcher->signBlob($stringToSign, $forceOpenSsl);
154         if ($this->fetcher instanceof GetQuotaProjectInterface) {
155             return $this->fetcher->getQuotaProject();
171         if (!$this->fetcher instanceof ProjectIdProviderInterface) {
178         return $this->fetcher->getProjectId($httpHandler);
196         if (!$this->fetcher instanceof UpdateMetadataInterface) {
215         $newMetadata = $this->fetcher->updateMetadata(
221         if (!$cached && $token = $this->fetcher->getLastReceivedToken()) {
244             : $this->fetcher->getCacheKey();
274                 : $this->fetcher->getCacheKey();