public String getAvailabilityZone() {
        return this.availabilityZone;
    }
<p>
The Amazon EC2 Availability Zone for the cluster. <code>AvailabilityZone</code> is used for uniform instance
groups, while <code>AvailabilityZones</code> (plural) is used for instance fleets.
</p>

@return The Amazon EC2 Availability Zone for the cluster. <code>AvailabilityZone</code> is used for uniform
        instance groups, while <code>AvailabilityZones</code> (plural) is used for instance fleets.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/PlacementType.java