docs: @NotNull public Collection<Record> loadRecords(@NotNull Collection<String> keys, @NotNull CacheHeaders cacheHeaders) {
      List<Record> records = new ArrayList<>(keys.size());
      for (String key : keys) {
        final Record record = loadRecord(key, cacheHeaders);
        if (record != null) {
          records.add(record);
        }
      }
      return records;
    }