public GroupIdentifier withGroupArn(String groupArn) {
        setGroupArn(groupArn);
        return this;
    }
<p>
The ARN of the resource group.
</p>

@param groupArn
       The ARN of the resource group.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-resourcegroups/src/main/java/com/amazonaws/services/resourcegroups/model/GroupIdentifier.java