@Override
    public int size() {
      int result = 0;
      StatArchiveReader.StatArchiveFile[] archives = getArchives();
      for (final StatArchiveFile archive : archives) {
        result += archive.resourceInstSize;
      }
      return result;
    }
Wraps an instance of StatSpec but alwasy returns a combine type of NONE.
geode-core/src/main/java/org/apache/geode/internal/statistics/StatArchiveReader.java