public String getAvailabilityZone() {
        return this.availabilityZone;
    }
<p>
The Availability Zone that the DB instance is created in. For information about Amazon Web Services Regions and
Availability Zones, see <a
href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.RegionsAndAvailabilityZones.html">Regions
and Availability Zones</a> in the <i>Amazon RDS User Guide.</i>
</p>
<p>
Default: A random, system-chosen Availability Zone in the endpoint's Amazon Web Services Region.
</p>
<p>
Example: <code>us-east-1d</code>
</p>
<p>
Constraint: The <code>AvailabilityZone</code> parameter can't be specified if the DB instance is a Multi-AZ
deployment. The specified Availability Zone must be in the same Amazon Web Services Region as the current
endpoint.
</p>

@return The Availability Zone that the DB instance is created in. For information about Amazon Web Services
        Regions and Availability Zones, see <a
        href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.RegionsAndAvailabilityZones.html"
        >Regions and Availability Zones</a> in the <i>Amazon RDS User Guide.</i> </p>
        <p>
        Default: A random, system-chosen Availability Zone in the endpoint's Amazon Web Services Region.
        </p>
        <p>
        Example: <code>us-east-1d</code>
        </p>
        <p>
        Constraint: The <code>AvailabilityZone</code> parameter can't be specified if the DB instance is a
        Multi-AZ deployment. The specified Availability Zone must be in the same Amazon Web Services Region as
        the current endpoint.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/RestoreDBInstanceFromS3Request.java