[Newbies] Traits

Armed with new knowledge of Traits gained from the excellent "Squeak By Example" I tried: Smalltalk allClasses select: [:each | each hasTraitComposition]

which gave:

an OrderedCollection(ActionSequence BalloonBezierSimulation BalloonEngine BalloonEngineConstants BasicRequestor Behavior BrowserProvider ....WorldMenuProvider XMLTokenizer ZipConstants ZipFileConstants)

However browsing to a random class say "ActionSquence", doesn't show any evidence of Trait composition. Is this a problem with the current browser? Also is there a way to browse a Trait say TPureBehavior

My image is based on: sq3.9-7067web07.08.1

Thanks

Nick