anchor.diff:  -export([log_info/2, log_info/3]).
   -export([log_recv/4]).
   -export([epidemic_reply_msg/4]).
  +-export([get_msg_tag/1]).
   
   %% useful in e.g. filter funs
   -export([normalize_pidinfo/1]).
  
positive.code:             EventTime = element(2, X),
              io:format(
                File, "\\draw [color=blue] (~fcm, -~f) ++(0, 0.1cm) node[rotate=60, anchor=west, inner sep=1pt] {\\tiny ~s}-- ++(0, -0.2cm);~n",
                [EventTime/ScaleX, SrcNum/2, term_to_latex_string(get_msg_tag(element(5, X)))]),
              %% not yet implemented
              DrawTrace
      end,
      draw_messages(File, Nodes, ScaleX, HaveRealTime, RemainingTrace).
  
negative.code: % @copyright 2012-2016 Zuse Institute Berlin
  
  %   Licensed under the Apache License, Version 2.0 (the "License");
  %   you may not use this file except in compliance with the License.
  