Can't refer to a subcomponent by its grade name in an IoC reference for model listener on the parent.

When trying to hook up functionality between a child component and the parent component, if an IoC reference used on a model listener, or invoker used by a model listener, refers to the subcomponent by its grade name, the reference will fail to resolve.

It will work if the IoC reference is made using the member name for the subcomponent as defined in the components block.