anchor.diff:  re_register_stat(Arg) ->
       case (catch do_update(Arg)) of
           {'EXIT', _} ->
  -            Stats =  stats_from_update_arg(Arg),
  +            Stats = stats_from_update_arg(Arg),
               [begin
                    (catch folsom_metrics:delete_metric(Name)),
                    do_register_stat(Name, Type)
                end || {Name, {metric, _, Type, _}} <- Stats];
  -        ok  ->
  +        ok ->
               ok
       end.
   
  
positive.code: do_update({index_create, Pid}) ->
      folsom_metrics:notify_existing_metric({?APP, index, fsm, create}, 1, spiral),
      folsom_metrics:notify_existing_metric({?APP, index, fsm, active}, {inc, 1}, counter),
      add_monitor(index, Pid);
  do_update(index_create_error) ->
      folsom_metrics:notify_existing_metric({?APP, index, fsm, create, error}, 1, spiral);
  do_update({list_create, Pid}) ->
      folsom_metrics:notify_existing_metric({?APP, list, fsm, create}, 1, spiral),
      folsom_metrics:notify_existing_metric({?APP, list, fsm, active}, {inc, 1}, counter),
      add_monitor(list, Pid);
  do_update(list_create_error) ->
      folsom_metrics:notify_existing_metric({?APP, list, fsm, create, error}, 1, spiral);
  do_update({fsm_destroy, Type}) ->
  
negative.code:     stats_from_update_arg({fsm_spawned, Type}) ++
          [{{?APP, node, Type, fsm, errors}, {metric,[], spiral, undefined}}];
  stats_from_update_arg({index_create, _Pid}) ->
      [{{?APP, index, fsm, create}, {metric, [], spiral, undefined}},
       {{?APP, index, fsm, active}, {metric, [], counter, undefined}}];
  stats_from_update_arg(index_create_error) ->
      [{{?APP, index, fsm, create, error}, {metric, [], spiral, undefined}}];
  stats_from_update_arg({list_create, _Pid}) ->
      [{{?APP, list, fsm, create}, {metric, [], spiral, undefined}},
       {{?APP, list, fsm, active}, {metric, [], counter, undefined}}];
  stats_from_update_arg(list_create_error) ->
      [{{?APP, list, fsm, create, error}, {metric, [], spiral, undefined}}];
  stats_from_update_arg(_) ->
  