anchor.diff:  
   %% API
   -export([start_link/0]).
  +
  +-export([find_metrics/1]).
   
   %% gen_server callbacks
   -export([init/1,
  
positive.code: %%                                   {stop, Reason, State}
  %% @end
  %%--------------------------------------------------------------------
  handle_call(_Request, _From, State) ->
      Reply = ok,
      {reply, Reply, State}.
  
negative.code:          terminate/2,
           code_change/3]).
  
  -define(FINDER_UPDATE_INTERVAL, 10000).
  -define(FINDER_SPECIAL_CHARS, [<<"*">>, <<"?">>, <<"{">>, <<"}">>]).
  
  -record(state, {metrics, status=none, data_dir, timer, count}).
  
  -record(metric_file, {
            name :: nonempty_string(),
  