docs: public DescribeRulesPackagesResult withRulesPackages(RulesPackage... rulesPackages) {
          if (this.rulesPackages == null) {
              setRulesPackages(new java.util.ArrayList<RulesPackage>(rulesPackages.length));
          }
          for (RulesPackage ele : rulesPackages) {
              this.rulesPackages.add(ele);
          }
          return this;
      }