version property
Version is 1 when the key was created and rises by one on every overwrite. It counts writes, not content changes: re-storing an identical document bumps 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
int? version;