amount = $amount; } public function getAmount() { return $this->amount; } /** * @param string */ public function setCurrencyCode($currencyCode) { $this->currencyCode = $currencyCode; } /** * @return string */ public function getCurrencyCode() { return $this->currencyCode; } } // Adding a class alias for backwards compatibility with the previous class name. class_alias(VolumeSaleInfoRetailPrice::class, 'Google_Service_Books_VolumeSaleInfoRetailPrice');