docs: void iteratorSpecialDelete(
                                Iterator       iter,
                                GBSNode        node,
                                int            index)
      {
          _vno++;
          if ((_vno&1) == 1)
          {
              node.deleteByLeftShift(index);
              node.adjustMedian();
              _population--;
          }
          synchronized(iter)
          {
          }
          _vno++;
      }