his);
      this.row_ = undefined;
      this.displayLabel_ = '';
      this.histogram_ = undefined;
      this.histogramSpan_ = undefined;
      this.overviewChart_ = undefined;
      this.mwuResult_ = undefined;
    },

    ready() {
      this.addEventListener('click', this.onClick_.bind(this));
    },

    attached() {
      if (this.row) {
        this.row.rootViewState.addUpdateListener(this.rootListener_);
      }
    },

    detached() {
      this.row.rootViewState.removeUpdateListener(this.rootLis