code: def highestMax(requestContext, seriesList, n=1):
      
      result_list = sorted(seriesList, key=lambda s: safeMax(s))[-n:]
      return sorted(result_list, key=lambda s: max(s), reverse=True)
docs: Takes one metric or a wildcard seriesList followed by an integer N.
  
      Out of all metrics passed, draws only the N metrics with the highest
      maximum value in the time period specified.
  
      Example::
  
          &target=highestMax(server*.instance*.threads.busy,5)
  
      Draws the top 5 servers who have had the most busy threads during the time
      period specified.