Sets the retention of the specified log group. A retention policy allows you to configure the number of days for which to retain log events in the specified log group.
cloudwatchlogs_put_retention_policy(logGroupName, retentionInDays)
[required] The name of the log group.
[required]
svc$put_retention_policy( logGroupName = "string", retentionInDays = 123 )