/* Used in the parallel case.  Returns "true" iff this addition causes
     the size limit to be reached. */

  void add_reference(OopOrNarrowOopStar from, int tid) {

  {- -------------------------------------------
  (1) OtherRegionsTable::add_reference() を呼び出すだけ.
      ---------------------------------------- -}

        _other_regions.add_reference(from, tid);
      }