docs: @Override
    public Map<K, V> getAllFailure(Iterable<? extends K> keys, StoreAccessException e) {
      cleanup(keys, e);
  
      HashMap<K, V> result = keys instanceof Collection<?> ? new HashMap<>(((Collection<? extends K>) keys).size()) : new HashMap<>();
      for (K key : keys) {
        result.put(key, null);
      }
      return result;
    }