docs: public OrderableDBInstanceOption withAvailabilityZones(AvailabilityZone... availabilityZones) {
          if (this.availabilityZones == null) {
              setAvailabilityZones(new com.amazonaws.internal.SdkInternalList<AvailabilityZone>(availabilityZones.length));
          }
          for (AvailabilityZone ele : availabilityZones) {
              this.availabilityZones.add(ele);
          }
          return this;
      }