code: function(properties, data) {
              var xAxisKey = data.xAxisKey,
                  useTimeNames = (data.xAxisType === 'time'),
                  resolveName = this.getTooltipName.bind(this),
                  useTotalCount = this.useTotalCount;
  
              $.extend(true, this.hcConfig, {
                  tooltip: {
                      formatter: function() {
                          var seriesColorRgb = Splunk.JSCharting.ColorUtils.removeAlphaFromColor(this.point.color);
  
                          // SPL-45604, if the series itself is percent, suppress the 'bonus' percent display
                          if(this.series.name === 'percent') {
                              return [
                                  '<span style="color:#cccccc">', (useTimeNames ? 'time: ' : xAxisKey + ': '), '</span>',
                                  '<span style="color:', seriesColorRgb, '">', Splunk.JSCharting.ParsingUtils.escapeHtml(resolveName(this, useTimeNames)), '</span> <br/>',
                                  '<span style="color:#cccccc">', Splunk.JSCharting.ParsingUtils.escapeHtml(this.series.name), ': </span>',
                                  '<span style="color:#ffffff">', this.y, '</span>'
                              ].join('');
                          }
  
                          return [
                              '<span style="color:#cccccc">', (useTimeNames ? 'time: ' : xAxisKey + ': '), '</span>',
                              '<span style="color:', seriesColorRgb, '">', Splunk.JSCharting.ParsingUtils.escapeHtml(resolveName(this, useTimeNames)), '</span> <br/>',
                              '<span style="color:#cccccc">', Splunk.JSCharting.ParsingUtils.escapeHtml(this.series.name), ': </span>',
                              '<span style="color:#ffffff">', this.y, '</span> <br/>',
                              '<span style="color:#cccccc">', ((useTotalCount) ? 'percent' : this.series.name + '%'), ': </span>',
                              '<span style="color:#ffffff">', format_percent(this.percentage / 100), '</span>'
                          ].join('');
                      }
                  }
              });
          }
docs: override