I had a look at the ContentAvailable event and got a bit confused:
1. Definition of this event is in Root class, the consequence is that also
Group classes inherit this event. Do Group objects need to send this event,
and what could that be useful for?
2. Do those Ingredient classes which are not allowed to have content data
(f.ex. Rectangle class) generate the ContentAvailable event? The wording in
section 8.2 is unclear about that.
Greetings
Guido