I assume the intention was to eventually move it out of Qt.labs.models, once we've had a second look at the API, and are happy enough with it. The DelegateChooser uses the adaptor model's `value` function, to fetch data from the model, which it then uses for finding a suitable DelegateChoice to use. (Based on the DelegateChoice::roleValue property). Since the adaptor model's `value` function takes a QString, as the role to read data from, it won't make sense to change the datatype of DelegateChooser::role. The rest of the API makes sense too, in my opinion, and I see no reason to change it. Add a simple test in tst_qqmldelegatemodel, since QQmlDelegateModel is using the DelegateChooser in QQmlDelegateModelPrivate::resolveDelegate. [ChangeLog][QtQmlModels][Important Behavior Change] DelegateChooser has been moved from Qt.labs.models to QtQml.Models. Fixes: QTBUG-98101 Task-number: QTBUG-100069 Change-Id: I76ea58f57475b6a069517b5030e2ba3ac47007d2 Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>