version property
The version number helps you keep track of multiple versions of your creative in your reports.
The version number will always be auto-generated during insert operations to start at 1. For tracking creatives the version cannot be incremented and will always remain at 1. For all other creative types the version can be incremented only by 1 during update operations. In addition, the version will be automatically incremented by 1 when undergoing Rich Media creative merging. Applicable to all creative types.
Implementation
core.int? version;