version property
Version counts deployments of this project from 1, so the history reads as an ordered sequence rather than by timestamp. It is per project, not global.
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;