anchor.diff:  %% API
   -export([start/0,
           log/8, log_dest/9, log/3, log/4,
  -        trace_file/2, trace_file/3, trace_console/1, trace_console/2, clear_all_traces/0,
  -        status/0,
  +        trace_file/2, trace_file/3, trace_console/1, trace_console/2,
  +        clear_all_traces/0, stop_trace/1, status/0,
           get_loglevel/1, set_loglevel/2, set_loglevel/3, get_loglevels/0,
           minimum_loglevel/1, posix_error/1,
           safe_format/3, safe_format_chop/3]).
  
positive.code:                     lager_mochiglobal:put(loglevel, {MinLevel, [Trace|Traces]});
                  _ -> ok
              end,
              ok;
          Error ->
              Error
      end.
  
negative.code:                     lager_mochiglobal:put(loglevel, {MinLevel, [Trace|Traces]});
                  _ -> ok
              end,
              {ok, Trace};
          Error ->
              Error
      end.
  
  stop_trace(Trace) ->
      {MinLevel, Traces} = lager_mochiglobal:get(loglevel),
      lager_mochiglobal:put(loglevel, {MinLevel, lists:delete(Trace, Traces)}),
      %% TODO - somehow determine if the handler is safe to stop, its not
      %$ straightforward to tell.
      ok.
  
  clear_all_traces() ->
      {MinLevel, _Traces} = lager_mochiglobal:get(loglevel),
  