public DBClusterAutomatedBackup withAvailabilityZones(String... availabilityZones) {
        if (this.availabilityZones == null) {
            setAvailabilityZones(new com.amazonaws.internal.SdkInternalList<String>(availabilityZones.length));
        }
        for (String ele : availabilityZones) {
            this.availabilityZones.add(ele);
        }
        return this;
    }
<p>
The Availability Zones where instances in the DB cluster can be created. For information on Amazon Web Services
Regions and Availability Zones, see <a
href="https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Concepts.RegionsAndAvailabilityZones.html"
>Regions and Availability Zones</a>.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setAvailabilityZones(java.util.Collection)} or {@link #withAvailabilityZones(java.util.Collection)} if
you want to override the existing values.
</p>

@param availabilityZones
       The Availability Zones where instances in the DB cluster can be created. For information on Amazon Web
       Services Regions and Availability Zones, see <a href=
       "https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Concepts.RegionsAndAvailabilityZones.html"
       >Regions and Availability Zones</a>.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/DBClusterAutomatedBackup.java