Such classes include "widget with labels", "widget set", "widget with scrollbars", etc. By using templates we ensure, for example, that a vtkKWPushButtonSet, i.e. a set of vtkKWPushButton, uses the same basic API as a vtkKWLabelSet, i.e. a set of vtkKWLabel.
The documentation for any of these auto-generated classes explicitly specifies which templates they were based on, and provides a link to the group of classes that were created from the same template.
The auto-generated classes groups are listed in the Auto-Generated Classes section.