docs: private void findIndex(
      int              lower,
      int              upper,
      Object           new1,
      NodeInsertPoint  point)
    {
      int nkeys = numKeys(lower, upper);
      if (nkeys < 4)
        sequentialFindIndex(lower, upper, new1, point);
      else
        binaryFindIndex(lower, upper, new1, point);
    }