How does a payment saving work?

Context: How does \Magento\Sales\Model\ResourceModel\Order\Relation::processRelation() work?

Details: How does \Magento\OfflinePayments\Observer\BeforeOrderPaymentSaveObserver handle the sales_order_payment_save_before event?


Details: How does \Magento\Sales\Model\ResourceModel\EntityAbstract::_beforeSave() work?



Details: How does \Magento\Framework\Model\ResourceModel\Db\VersionControl\AbstractDb::processAfterSaves() work for a payment?

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