code: def rangeOfSeries(requestContext, *seriesLists):
      
      if not seriesLists or not any(seriesLists):
          return []
      seriesList, start, end, step = normalize(seriesLists)
      name = "rangeOfSeries(%s)" % formatPathExpressions(seriesList)
      values = (safeSubtract(max(row),
                             min(row)) for row in zip_longest(*seriesList))
      series = TimeSeries(name, start, end, step, values)
      series.pathExpression = name
      return [series]
docs: Takes a wildcard seriesList.
      Distills down a set of inputs into the range of the series
  
      Example::
  
          &target=rangeOfSeries(Server*.connections.total)