Used for return value only. Represents value unknown in this version.
PROPOSED
Initial state of the draft, the advertiser can start adding changes with no effect on serving.
REMOVED
The campaign draft is removed.
PROMOTING
Advertiser requested to promote draft's changes back into the original campaign. Advertiser can poll the long running operation returned by the promote action to see the status of the promotion.
PROMOTED
The process to merge changes in the draft back to the original campaign has completed successfully.
PROMOTE_FAILED
The promotion failed after it was partially applied. Promote cannot be attempted again safely, so the issue must be corrected in the original campaign.
