docs: public DescribeClusterVersionsResult withClusterVersions(ClusterVersion... clusterVersions) {
          if (this.clusterVersions == null) {
              setClusterVersions(new com.amazonaws.internal.SdkInternalList<ClusterVersion>(clusterVersions.length));
          }
          for (ClusterVersion ele : clusterVersions) {
              this.clusterVersions.add(ele);
          }
          return this;
      }