public void setAvailabilityZone(String availabilityZone) {
        this.availabilityZone = 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>

@param availabilityZone
       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