Add or delete Regions from your replication set.
See https://www.paws-r-sdk.com/docs/ssmincidents_update_replication_set/ for full documentation.
ssmincidents_update_replication_set(actions, arn, clientToken = NULL)
[required] An action to add or delete a Region.
[required] The Amazon Resource Name (ARN) of the replication set you're updating.
A token that ensures that the operation is called only once with the specified details.