public String getDefaultAvailabilityZone() {
        return this.defaultAvailabilityZone;
    }
<p>
The stack's default Availability Zone, which must be in the stack's region. For more information, see <a
href="https://docs.aws.amazon.com/general/latest/gr/rande.html">Regions and Endpoints</a>. If you also specify a
value for <code>DefaultSubnetId</code>, the subnet must be in the same zone. For more information, see
<a>CreateStack</a>.
</p>

@return The stack's default Availability Zone, which must be in the stack's region. For more information, see <a
        href="https://docs.aws.amazon.com/general/latest/gr/rande.html">Regions and Endpoints</a>. If you also
        specify a value for <code>DefaultSubnetId</code>, the subnet must be in the same zone. For more
        information, see <a>CreateStack</a>.
aws-java-sdk-opsworks/src/main/java/com/amazonaws/services/opsworks/model/UpdateStackRequest.java