public String getAvailabilityZoneGroup() {
        return this.availabilityZoneGroup;
    }
<p>
The Availability Zone group. If you specify the same Availability Zone group for all Spot Instance requests, all
Spot Instances are launched in the same Availability Zone.
</p>

@return The Availability Zone group. If you specify the same Availability Zone group for all Spot Instance
        requests, all Spot Instances are launched in the same Availability Zone.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/SpotInstanceRequest.java