logGroupArn  
  The Amazon Resource Name (ARN) of the log group. This version of the ARN doesn't include a trailing :* after the log group name.
Use this version to refer to the ARN in the following situations:
- In the - logGroupIdentifierinput field in many CloudWatch Logs APIs.
- In the - resourceArnfield in tagging APIs
- In IAM policies, when specifying permissions for TagResource, UntagResource, and ListTagsForResource.