public String getStackId() {
        return this.stackId;
    }
<p>
A stack ID. If you include this parameter, <code>DescribeElasticIps</code> returns a description of the Elastic
IP addresses that are registered with the specified stack.
</p>

@return A stack ID. If you include this parameter, <code>DescribeElasticIps</code> returns a description of the
        Elastic IP addresses that are registered with the specified stack.
aws-java-sdk-opsworks/src/main/java/com/amazonaws/services/opsworks/model/DescribeElasticIpsRequest.java