[Moose-dev] Changing arrow head types in RTMondrian

I'd like my visualizations showing inheritance to be UML-like. That is, I'd like arrow heads to be empty. I found some classes (RTEmptyArrowHead, etc.) and thought they might be the answer. However, I can't get it to work in the following code. Do those classes work?

I'm using Moose suite 6.0 on Windows 10.

| b line | b := RTMondrian new. b shape circle size: 3. b nodes: RTShape withAllSubclasses.

"b shape arrowedLine withShorterDistanceAttachPoint." line := RTEmptyArrow new. b shape line withShorterDistanceAttachPoint.

b edgesFrom: #superclass. b layout forceWithCharge: -500. b build. ^ b view

http://forum.world.st/file/n4915133/RTEmptyArrowAttempt.png

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