ntents();
    },

    onMouseMove_(e) {
      const lastBarMouseOverTarget = this.currentBarMouseOverTarget_;
      this.currentBarMouseOverTarget_ = null;

      const x = e.offsetX;
      const y = e.offsetY;

      const chartLeft = CHART_PADDING_LEFT;
      const chartRight = this.chartWidth_ - CHART_PADDING_RIGHT;
      const chartTop = AXIS_PADDING_TOP;
      const chartBottom = this.chartHeight_ - AXIS_PADDING_BOTTOM;
      const chartInnerWidth = chartRight - chartLeft;

      if (x > chartLeft && x