anchor.diff:  %% API
   -export([start_link/1]).
   
  --record(state, {bucket, counters}).
  +-record(state, {bucket, counters, count=?LOG_FREQ}).
   
   %% gen_server callbacks
   -export([init/1, handle_call/3, handle_cast/2,
  
positive.code: 
  
  %% Internal functions
  latest_tick(TS) ->
      latest_tick(TS, 0).
  
  
negative.code: 
  -behaviour(gen_server).
  
  -define(STATS_TIMER, 1000). % How often in ms we collect stats
  -define(LOG_FREQ, 100).     % Dump every n collections to the log
  -define(WIDTH, 30).         % Width of the key part of the formatted logs
  
  -define(l2r(KeyName),
          l2r(KeyName, V, Rec) ->
  