code: public GP splitAfterLast(ST obj, PT startPoint) {
  		return splitAt(lastIndexOf(obj, startPoint), false);
  	}
docs: Split this path and retains the first part of the
  part in this object and reply the second part.
  The last occurence of the specified element
  will be in the first part.
  
  <p>This function removes until the <i>last occurence</i>
  of the given object.
  
  @param obj is the segment to search for.
  @param startPoint is the starting point of the searched segment.
  @return the rest of the path after the last occurence of the given element.