private LocalRegion toRegion(Object element) {
    LocalRegion region = (LocalRegion) element;
    if (region != null) {
      // do not return until done initializing (unless this is an initializing thread)
      region.waitOnInitialization();
    }
    return region;
  }
Make a LocalRegion from an element in the subregion map Sent to parent region.

@return This method may return null or a destroyed region if the region was just destroyed
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java