Apparently when I move the moose from the finder elements (classes) to the model item I get
a DNU point:from:



MoprhTreeListManager>>clicked: event inTheCheckboxOf: aTargetMorph
        | position |

        position := aTargetMorph point: event position from: client.
        ^ self isCheckList and: [ (aTargetMorph checkClickableZone translateBy: 2 @ 0) containsPoint: position ]

Stef
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