docs: public Region withRelationalDatabaseAvailabilityZones(AvailabilityZone... relationalDatabaseAvailabilityZones) {
          if (this.relationalDatabaseAvailabilityZones == null) {
              setRelationalDatabaseAvailabilityZones(new java.util.ArrayList<AvailabilityZone>(relationalDatabaseAvailabilityZones.length));
          }
          for (AvailabilityZone ele : relationalDatabaseAvailabilityZones) {
              this.relationalDatabaseAvailabilityZones.add(ele);
          }
          return this;
      }