"opted_state", ]; public $optedState; public function setOptedState($optedState) { $this->optedState = $optedState; } public function getOptedState() { return $this->optedState; } } // Adding a class alias for backwards compatibility with the previous class name. class_alias(UsersettingsNotificationPriceDrop::class, 'Google_Service_Books_UsersettingsNotificationPriceDrop');