docs: private void rightDelete(
                              GBSNode           p,
                              GBSNode           l,
                              Object            deleteKey,
                              DeleteNode        point)
      {
          if (l == null)                 /* There is no upper successor           */
              rightDeleteNoSuccessor(p, deleteKey, point);
          else                           /* There is an upper successor           */
              rightDeleteWithSuccessor(p, l, deleteKey, point);
      }