Context: How does \Magento\Framework\Model\ResourceModel\Db\VersionControl\RelationComposite::processRelations() work for a shipment?
\Magento\Framework\Model\ResourceModel\Db\VersionControl\RelationComposite::processRelations()
Details: How does a shipment item saving work?
Details: How does \Magento\Sales\Model\Order\Shipment::getTracks() work?
\Magento\Sales\Model\Order\Shipment::getTracks()
Details: How does \Magento\Sales\Model\Order\Shipment::getComments() work?
\Magento\Sales\Model\Order\Shipment::getComments()
See also:
relation-processor