code: def absolute(requestContext, seriesList):
      
      for series in seriesList:
          series.name = "absolute(%s)" % (series.name)
          series.pathExpression = series.name
          for i, value in enumerate(series):
              series[i] = safeAbs(value)
      return seriesList
docs: Takes one metric or a wildcard seriesList and applies the mathematical abs
      function to each datapoint transforming it to its absolute value.
  
      Example::
  
          &target=absolute(Server.instance01.threads.busy)
          &target=absolute(Server.instance*.threads.busy)