Relation
Magento\Customer\Model\ResourceModel\Customer\Relation
What it does
This class handles the relationship between Customer entities and their associated Address records during save operations.
It ensures that when a customer is saved, all related addresses are properly saved or deleted, and default billing/shipping addresses are correctly maintained.
Developers typically don't interact with this class directly as it's automatically invoked by Magento's entity save process through the version control mechanism.
Public Methods
- processRelation()