no, it is not. 
that will keep the registry forever because it acts over a block (no ephemerons, remember)

Esteban

On Aug 28, 2013, at 11:56 AM, Tudor Girba <tudor@tudorgirba.com> wrote:

Does this work?

Doru


On Wed, Aug 28, 2013 at 11:54 AM, St�phane Ducasse <stephane.ducasse@inria.fr> wrote:
whenListChanged: aBlock
        "Specify a block to value after the contents of the list has changed"

        "Basically when you set a new list of items"

        <api: #event>
        | block |
        block := [ :announcement :ann |
        aBlock
                cull: announcement newContents
                cull: announcement oldContents
                cull: announcement
                cull: ann ].
        listAnnouncer weak
                when: ValueChanged
                do: block




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