this.$.radioPicker.style.display = 'none';
      this.$.radioPicker.items = EVENT_FIELD;
      this.$.radioPicker.select('cpuSelfTime');
      this.$.radioPicker.addEventListener('change', () => {
        if (this.isAttached) this.updateContents_();
      });

      this.$.histogramSpan.graphWidth = 400;
      this.$.histogramSpan.canMergeSampleDiagnostics = false;
      this.$.histogramContainer.style.display = 'none';
    },

    attached() {
      if (this.currentSelection_ !== undefined) this.updateCont