docs: public ListRecordsResult withMergedDatasetNames(String... mergedDatasetNames) {
          if (this.mergedDatasetNames == null) {
              setMergedDatasetNames(new com.amazonaws.internal.SdkInternalList<String>(mergedDatasetNames.length));
          }
          for (String ele : mergedDatasetNames) {
              this.mergedDatasetNames.add(ele);
          }
          return this;
      }