code: func getTotalSeries(totalSeriesLists, include map[string][]models.Series, cache map[Req][]models.Series) map[string]models.Series {
  	totalSeries := make(map[string]models.Series, len(totalSeriesLists))
  	for key := range totalSeriesLists {
  		if _, ok := include[key]; ok {
  			totalSeries[key] = sumSeries(totalSeriesLists[key], cache)
  		} else {
  			totalSeries[key] = totalSeriesLists[key][0]
  		}
  
  	}
  	return totalSeries
  }
docs: // Sums each seriesList in map of seriesLists