expiration = $expiration; } /** * @return string */ public function getExpiration() { return $this->expiration; } /** * @param string */ public function setHistoryId($historyId) { $this->historyId = $historyId; } /** * @return string */ public function getHistoryId() { return $this->historyId; } } // Adding a class alias for backwards compatibility with the previous class name. class_alias(WatchResponse::class, 'Google_Service_Gmail_WatchResponse');