> Speaking of that, one will notice that the class comment of UITheme has the examples list:
>
> Common superclass for User Interface themes. Provides methods for creating new morphs in a standard way, various "services" like a file dialog, message dialogs etc. and also methods for customising aspects of the appearance of various morphs.
> Though conceptually abstract, no code is "missing". Subclasses, therefore, should override the aspects they wish to change.
>
> UITheme exampleBasicControls
> UITheme exampleBuilder
> UITheme exampleColorControls
> UITheme exampleDialogs
> UITheme exampleGroups
> UITheme exampleOtherControls
> UITheme exampleWindowWithToolbars
>
> But in 3.0 it is not in there, it moved to Widgets in 'Morphic-Examples-Widgets’

indeed!

> with:
>
> ExampleBuilderMorph
> WidgetExamples
>
> Maybe worth a change in the class comment.

Yes!
I think that many changes missed a deprecation or information to help people migrating.