freshness property
Freshness says, in one phrase, how long after a publish a reader sees it. It is the sentence an operator actually wants; the booleans above are how a machine reads the same fact.
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? freshness;