A problem with binding to the resources prop of Item

[Ashley Paul]

I get this warning in the logs, the reasonI want to bind to resources prop is to filter objects that are of QtObject like Menu and Popup

QQmlExpression: Expression depends on non-bindable properties:
     QQuickRootItem::resources

is there another way other than this?

model: Window.contentItem.resources.filter(r => r instanceof Popup)