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

Context: How does \Magento\Framework\Model\ResourceModel\Db\VersionControl\RelationComposite::processRelations() work for a shipment?

Details: How does a shipment item saving work?

Details: How does \Magento\Sales\Model\Order\Shipment::getTracks() work?

Details: How does \Magento\Sales\Model\Order\Shipment::getComments() work?

See also: