public String getInstanceArn() {
        return this.instanceArn;
    }
<p>
The ARN of the instance of IAM Identity Center under which the operation will run.
</p>

@return The ARN of the instance of IAM Identity Center under which the operation will run.
aws-java-sdk-ssoadmin/src/main/java/com/amazonaws/services/ssoadmin/model/DescribeInstanceRequest.java