issueDisplayNumber = $issueDisplayNumber; } public function getIssueDisplayNumber() { return $this->issueDisplayNumber; } public function setIssueOrderNumber($issueOrderNumber) { $this->issueOrderNumber = $issueOrderNumber; } public function getIssueOrderNumber() { return $this->issueOrderNumber; } } // Adding a class alias for backwards compatibility with the previous class name. class_alias(VolumeseriesinfoVolumeSeriesIssue::class, 'Google_Service_Books_VolumeseriesinfoVolumeSeriesIssue');