[Moose-dev] [Glamour] can't update a GLMTreePresentation

Hello, I have some difficulties to update a GLMTreePresentation. I wrote a small example to show my problem :

|browser collection| browser := GLMTabulator new. browser row: #list. browser transmit to: #list; andShow: [:a | a tree title: 'list'; display: [ :aCollection | aCollection ]. ].

collection := OrderedCollection withAll: #('a' 'b' 'c' 'd').

browser openOn: collection.

collection add: 'e'.

browser update.

browser openOn: collection

When an element is added to the collection, I would like the GLMTreePresentation to make this new element visible. I tried to send 'update' to the browser, but it doesn't seems to work. Do you have any other idea?