We use Quick3DNodeInstance as a proxy class to wrap QQuick3DNode.
The access to private API like QQuick3DNodePrivate::setIsHiddenInEditor()
is restriced by such proxy classes.
Change-Id: If5191c3b730359000cf983c3af206dcffa07be74
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>
Reviewed-by: Pasi Keränen <pasi.keranen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
