[Seaside] A litle question about Sets

[Michael Delache]

Hi all,

  I defined an object called AlbumAuthor.
In an other object, Album, I putted a instance variable called authors which
will contain the authors of the album.
So, I would like to know if I can define the instance as a Set but
containing only AlbumAuthor type objects.

I don't know if it's possible to do this. Someone could help with this one?
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