anchor.diff:      [ setelement(2, X, timer:now_diff(element(2, X), StartTime))
         || X <- SortedTrace].
   
  +-spec notime_delta(trace()) -> trace().
  +notime_delta(Trace) ->
  +    SortedTrace = lists:keysort(2, Trace),
  +    util:map_with_nr(fun(X, I) -> setelement(2, X, I*10) end, SortedTrace, 0).
  +
   %% sample call sequence to get a tx trace:
   %% tex traces have to be relatively short, so paste all at once to the
   %% erlang shell.
  
positive.code:             %% not yet implemented
              DrawTrace
      end,
      draw_messages(File, Nodes, ScaleX, RemainingTrace).
  
  %% Functions used to report tracing events from other modules
  -spec epidemic_reply_msg(passed_state(), anypid(), anypid(), comm:message()) ->
  
negative.code:                end,
                 [], Trace),
      Nodes = lists:reverse(NodesR),
      DrawTrace = DeltaFun(Trace),
  
      EndTime =  element(2, lists:last(DrawTrace)),
  
  