code: public DescribeReservedDBInstancesOfferingsResult withReservedDBInstancesOfferings(ReservedDBInstancesOffering... reservedDBInstancesOfferings) {
          if (this.reservedDBInstancesOfferings == null) {
              setReservedDBInstancesOfferings(new com.amazonaws.internal.SdkInternalList<ReservedDBInstancesOffering>(reservedDBInstancesOfferings.length));
          }
          for (ReservedDBInstancesOffering ele : reservedDBInstancesOfferings) {
              this.reservedDBInstancesOfferings.add(ele);
          }
          return this;
      }
docs: <p>
  A list of reserved DB instance offerings.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setReservedDBInstancesOfferings(java.util.Collection)} or
  {@link #withReservedDBInstancesOfferings(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param reservedDBInstancesOfferings
  A list of reserved DB instance offerings.
  @return Returns a reference to this object so that method calls can be chained together.