Re: [Pharo-users] AST visualization with Roassal

I think it's because somewhere in roassal objects (in this case ast nodes) are compared by value.

Pretty much; there is test for equality RTGroup>>elementFromModel: anObject ^ self detect: [ :el | el model = anObject ] ifNone: [ nil ] and equality is more often than not wanted. So solution might be to tell Mondrian that you want to compare by identity and not equality? Peter