Question Regarding Child tickets


I was looking into child tickets and came across this webpage:

It seemed unclear on the wiki if this was the correct way to do this or not
and if I needed to implement the first solution or the second or both.
Additionally at the bottom it says that it doesn’t work, so I am confused as
to how to implement this. If anyone could shed some light on it for me,
that would be fantastic.

Thanks in Advance

Greg Evans