On 25 Jul 2014, at 12:39, Sven Van Caekenberghe <sven@stfx.eu> wrote:I have mentioned this before, but EyeCollectionInspector is actually written against SequenceableCollection since it expects ordered external integer indexing. That is why currently every Collection subclass without this protocol and/or without a custom inspector fails. The alternative would be to move Collection class>>#inspectorClass to SequenceableCollection>>#inspectorClass. Then Collection subclasses that are not SequenceableCollection and that do not have a custom inspector will fail. Note that fail means a fall back to EyeBasicInspector.I did that change in 4.0 (with the mistake of putting #inspectorClass on the instance side of SequenceableCollection, I will fix that soon) Marcus