public void setAvailabilityZones(java.util.Collection<String> availabilityZones) {
        if (availabilityZones == null) {
            this.availabilityZones = null;
            return;
        }

        this.availabilityZones = new java.util.ArrayList<String>(availabilityZones);
    }
<p>
Provides the list of Amazon EC2 Availability Zones that instances in the cluster can be created in.
</p>

@param availabilityZones
       Provides the list of Amazon EC2 Availability Zones that instances in the cluster can be created in.
aws-java-sdk-docdb/src/main/java/com/amazonaws/services/docdb/model/DBCluster.java