How is \Magento\Sales\Model\Order::isFraudDetected() implemented and used?

Implementation

https://github.com/magento/magento2/blob/ffea3cd/app/code/Magento/Sales/Model/Order.php#L1117-L1126

The single usage

\Magento\Sales\Model\Order::registerCancellation()

https://github.com/magento/magento2/blob/ffea3cd/app/code/Magento/Sales/Model/Order.php#L1139-L1150

Details: How is \Magento\Sales\Model\Order::registerCancellation() implemented and used?

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