Faulty array assignment for QML_SEQUENTIAL_CONTAINER property

class PieSliceListRegistration
{
    Q_GADGET
    QML_FOREIGN(QList<PieSlice *>)
    QML_ANONYMOUS
    QML_SEQUENTIAL_CONTAINER(PieSlice *)
}; 

Q_PROPERTY(QList<PieSlice*> slices READ slices WRITE setSlices NOTIFY slicesChanged FINAL)

slices: [
    PieSlice {
        color: "red"
    },
    PieSlice {
        color: "black"
    },
    PieSlice {
        color: "blue"
    }
]