anchor.diff:  
   -spec get_trace(trace_id()) -> trace().
   get_trace(TraceId) ->
  +    LogRaw = get_trace_raw(TraceId),
  +    [case Event of
  +         {SendOrRcv, Time, TraceId, Source, Dest, {Tag, Key, Hops, Msg}}
  +           when Tag =:= ?lookup_aux orelse Tag =:= ?lookup_fin ->
  +             {SendOrRcv, Time, TraceId, Source, Dest,
  +              convert_msg({Tag, Key, Hops, convert_msg(Msg)})};
  +         {SendOrRcv, Time, TraceId, Source, Dest, Msg} ->
  +             {SendOrRcv, Time, TraceId, Source, Dest, convert_msg(Msg)};
  +         {log_info, _Time, _TraceId, _Pid, _Msg} = X -> X
  +     end || Event <- LogRaw].
  +
  +-spec convert_msg(Msg::comm:message()) -> comm:message().
  +convert_msg(Msg) when is_tuple(Msg) ->
  +    setelement(1, Msg, util:extint2atom(element(1, Msg))).
  +
  +-spec get_trace_raw(trace_id()) -> trace().
  +get_trace_raw(TraceId) ->
       LoggerPid = pid_groups:find_a(trace_mpath),
       comm:send_local(LoggerPid, {get_trace, comm:this(), TraceId}),
       receive
  
positive.code: -type anypid()       :: pid() | comm:mypid() | pidinfo().
  -type trace_id()     :: atom().
  -type send_event()   :: {log_send, erlang:timestamp(), trace_id(),
                           pidinfo(), pidinfo(), comm:message()}.
  -type info_event()   :: {log_info, erlang:timestamp(), trace_id(),
                           pidinfo(), comm:message()}.
  -type recv_event()   :: {log_recv, erlang:timestamp(), trace_id(),
                           pidinfo(), pidinfo(), comm:message()}.
  -type trace_event()  :: send_event() | info_event() | recv_event().
  -type trace()        :: [trace_event()].
  -type passed_state() :: {trace_id(), logger()}.
  -type gc_mpath_msg() :: {'$gen_component', trace_mpath, passed_state(),
                           pidinfo(), pidinfo(), comm:message()}.
  
  -ifdef(with_export_type_support).
  -export_type([logger/0]).
  
negative.code: 
  %% client functions
  -export([start/0, start/1, start/2, stop/0]).
  -export([get_trace/0, get_trace/1, get_trace_raw/1, cleanup/0, cleanup/1]).
  
  %% trace analysis
  -export([send_histogram/1]).
  