I'm not familar with that function, but I would guess because it's a QVariant holding a QImage?
There already are those stream operators, and I think they are already registered.
I'm not understanding why QVariatn doesn't know how/why to call it?
I'd figure that QVariant would write the type, the 0 byte, then have the object QDataStream& operator << into the QIODevice itself?
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