docs: public ListDatasetsResult withDatasetSummaries(DatasetSummary... datasetSummaries) {
          if (this.datasetSummaries == null) {
              setDatasetSummaries(new java.util.ArrayList<DatasetSummary>(datasetSummaries.length));
          }
          for (DatasetSummary ele : datasetSummaries) {
              this.datasetSummaries.add(ele);
          }
          return this;
      }