code: 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;
      }
docs: <p>
  The Availability Zones for databases. Follows the format <code>us-east-2a</code> (case-sensitive).
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setRelationalDatabaseAvailabilityZones(java.util.Collection)} or
  {@link #withRelationalDatabaseAvailabilityZones(java.util.Collection)} if you want to override the existing
  values.
  </p>
  
  @param relationalDatabaseAvailabilityZones
  The Availability Zones for databases. Follows the format <code>us-east-2a</code> (case-sensitive).
  @return Returns a reference to this object so that method calls can be chained together.