If I create a collection of forms and I release one of the forms, the reference disappears automatically from the collection. So it behaves unlike other object references which would normally prevent the form unloading.
Is this expected behaviour?

eg
x= create('collection')
y= create('form')
x.add(y)
? x.count && 1
x.show && click on close button to release form
? x.count && 0

By the way I like this behaviour, for the purpose that I wish to use it. I just wan't to know I can rely on it.