ref property
Ref is the org's OWN identifier for this party, carried so a caller can match a subject back to their system without keeping a second mapping. Opaque here: nothing in this plane parses or enforces it.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? ref;