Hello,
It seems there is a bug in the Morphic ToolBuilder lists, sorry if this is
not right place reporting it. Say, we have:
listSpec := builder pluggableListSpec new.
listSpec
      model: self;
      list: #fields;
       ...
      dropAccept: #acceptThis:;
      dropItem: #dropOn:at: .
Image stalls if I put #halt in #acceptThis

regards,
Vaidotas
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