
    get isHistogramOpen() {
      return (this.histogramSpan_ !== undefined) &&
        (this.$.histogram.style.display === 'block');
    },

    set isHistogramOpen(open) {
      if (!(this.histogram instanceof tr.v.Histogram) ||
          (this.histogram.numValues === 0)) {
        return;
      }

      // Unfortunately, we can't use a css attribute for this since this stuff
      // is tied up in all the possible states of this.histogram. See
      // updateContents_().

      this.$.scalar.style.displ