public String getCustomAmiId() {
        return this.customAmiId;
    }
<p>
Available only in Amazon EMR releases 5.7.0 and later. The ID of a custom Amazon EBS-backed Linux AMI if the
cluster uses a custom AMI.
</p>

@return Available only in Amazon EMR releases 5.7.0 and later. The ID of a custom Amazon EBS-backed Linux AMI if
        the cluster uses a custom AMI.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/Cluster.java