[Pharo-users] Auto/default selection in GLM

Hi all, I need to pre select an item in a list. Consider the following snipped, how do I tell the list the default selected item is, let say, Array? I could not find an example and tried different ways using transmissions with no luck | browser | browser := GLMTabulator new. browser title: 'test'; column: #classes; initialExtent: 200@300. browser transmit to: #classes; andShow: [ :pres | pres tree display: [ OrderedCollection with: Collection ]; children: [ :each | each subclasses]; allExpanded; format: [ :each | each name ]] . browser openOn: Collection TIA Arturo