Relation
Magento\Sales\Model\ResourceModel\Order\Relation
What it does
This class manages the persistence of related entities when saving a Magento order.
It automatically saves order items, payment information, status histories, and addresses whenever an order is saved, ensuring all relationships are properly maintained in the database.
Developers typically don't interact with this class directly as it's called automatically through Magento's version control system during order save operations.
Public Methods
- processRelation()