code: int findDeleteInRight(
      Object           delKey)
    {
      int idx = -1;
      int r = rightMostIndex();
      int m = midPoint();
      if (r > m)
        idx = findDelete(m, r, delKey);
      return idx;
    }
docs: Find the delete key in the right half of the node.
  
  <p>The key to be found is known to be greater than the key
  at the mid point.  If the key at the mid point is the last
  key in the node then the delete key is not here.</p>