I've seen a couple of instances recently where projects were trying to store per-object state in a TraitType instance. That doesn't work, in general: the TraitType instance is per-class, not per-object.
In the section of the user docs on writing your own TraitType subclass, it should be made clear that TraitType instances should be stateless: they shouldn't store per-object state from the HasTraits objects using them.
I've seen a couple of instances recently where projects were trying to store per-object state in a
TraitTypeinstance. That doesn't work, in general: theTraitTypeinstance is per-class, not per-object.In the section of the user docs on writing your own
TraitTypesubclass, it should be made clear thatTraitTypeinstances should be stateless: they shouldn't store per-object state from theHasTraitsobjects using them.