[Interest] Subclassing QQmlComponent for use in QML

[Evgeny Grablyk]

> If you just need to create your objects from QML
Sorry, I should have explained what I'm trying to do. I want to supply
my custom component to layer.effect[0], so that I know when the
contained item is created and can get a handle on it. The contained
item would be a custom effect that I want to control during it's
lifetime.

[0]: http://doc.qt.io/qt-5/qml-qtquick-item.html#layer.effect-prop