gio:list-model, gtk:section-model, gobject:object, common-lisp:standard-object, common-lisp:t

None

The gtk:map-list-model object is a list model that takes a list model and maps the items in that model to different items according to a gtk:map-list-model-map-func callback function. Create a list of gtk:event-controller objects.

(let* (...
       (widgets (gtk:widget-observe-children widget))
       (controllers (gtk:map-list-model-new widgets
                           (lambda (item)
                             (gtk:widget-observe-controllers item))))
       (model (gtk:flatten-list-model-new controllers)))
  ... )    

The gtk:map-list-model object will attempt to discard the mapped objects as soon as they are no longer needed and recreate them if necessary.