Freedoc
Magento\Dhl\Model\Source\Method\Freedoc
What it does
This class provides a source model for DHL shipping methods specifically for document shipments in Magento's admin configuration.
Developers use this when they need to populate dropdown options for DHL document shipping methods in the admin panel, with the option to show 'None' as a selectable method.
It extends the abstract DHL method class and sets the content type to documents rather than non-documents.