anchor.diff:  
       ok.
   
  -kill_reader(Config) ->
  -    ReaderId = ?config(reader_id, Config),
  +kill_reader(_Config) ->
       DefaultMeter = otel_meter_default,
   
       Meter = opentelemetry_experimental:get_meter(),
  
positive.code:                              unit = CounterUnit,
                               callback=_}, Counter),
  
      otel_meter_server:force_flush(?DEFAULT_METER_PROVIDER),
  
      ?assertLastValueReceive(CounterName, CounterDesc, CounterUnit, [{5, #{<<"a">> => <<"b">>}}]),
  
  
negative.code:                              value_type = ValueType,
                               unit = CounterUnit}, Counter),
  
      ?assertEqual(ok, otel_counter:add(Counter, 3, #{<<"c">> => <<"b">>})),
      ?assertEqual(ok, otel_counter:add(Counter, 3, #{<<"a">> => <<"b">>, <<"d">> => <<"e">>})),
  
      otel_meter_server:force_flush(?GLOBAL_METER_PROVIDER_REG_NAME),
  
      ?assertSumReceive(z_counter, <<"counter description">>, kb, [{3, #{<<"c">> => <<"b">>}}]),
  
  