key property
Key is the flag's primary key in the caller's (org, project) store, and the name evaluation looks it up by. On a write it is taken from the URL, never from the body: the stored document's own "key" is forced to match.
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? key;