int allEntriesSize() {
    int size = entryCount();
    for (Object regionObject : subregions.values()) {
      LocalRegion region = toRegion(regionObject);
      if (region != null && !region.isDestroyed()) {
        size += region.allEntriesSize();
      }
    }
    return size;
  }
Return the number of entries including in subregions. Used for recursive size calculation in
EntriesSet.size. This does not include tombstone entries stored in the region.
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java