version property
Version counts this app's deployments, from 1 and monotonically. It is what ORDERS them: a deploy only goes live if no higher version already is, so a build that finishes late is superseded instead of overwriting a newer one.
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;