.delta.referenceDisplayLabel) {
        this.updateMwu_();
        this.updateContents_();
      } else if (event.delta.alpha && this.mwuResult_) {
        this.mwuResult_.compare(this.row.rootViewState.alpha);
        this.updateSignificance_();
      }

      if (this.row.viewState.isOverviewed &&
          (event.delta.sortColumnIndex ||
           event.delta.sortDescending ||
           event.delta.displayStatisticName ||
           event.delta.referenceDisplayLabel)) {
        if (this.overviewChart_ 