docs: public DescribeClusterSubnetGroupsResult withClusterSubnetGroups(ClusterSubnetGroup... clusterSubnetGroups) {
          if (this.clusterSubnetGroups == null) {
              setClusterSubnetGroups(new com.amazonaws.internal.SdkInternalList<ClusterSubnetGroup>(clusterSubnetGroups.length));
          }
          for (ClusterSubnetGroup ele : clusterSubnetGroups) {
              this.clusterSubnetGroups.add(ele);
          }
          return this;
      }