@Override
    public int size() {
      if (recursive) {
        return allSubregionsSize() - 1 /* don't count this region */;
      }
      return subregions.size();
    }
@param nullOK if true, return null instead of throwing NoSuchElementException
@return the next element
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java