docs: public DescribeReservedElasticsearchInstanceOfferingsResult withReservedElasticsearchInstanceOfferings(
              ReservedElasticsearchInstanceOffering... reservedElasticsearchInstanceOfferings) {
          if (this.reservedElasticsearchInstanceOfferings == null) {
              setReservedElasticsearchInstanceOfferings(new java.util.ArrayList<ReservedElasticsearchInstanceOffering>(
                      reservedElasticsearchInstanceOfferings.length));
          }
          for (ReservedElasticsearchInstanceOffering ele : reservedElasticsearchInstanceOfferings) {
              this.reservedElasticsearchInstanceOfferings.add(ele);
          }
          return this;
      }