docs: public DescribeActiveReceiptRuleSetResult withRules(ReceiptRule... rules) {
          if (this.rules == null) {
              setRules(new com.amazonaws.internal.SdkInternalList<ReceiptRule>(rules.length));
          }
          for (ReceiptRule ele : rules) {
              this.rules.add(ele);
          }
          return this;
      }