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Kenneth Moreland authored
The implementation of `VariantArrayHandle` has been changed to be a relatively trivial subclass of `UnknownArrayHandle`. The advantage of this change is twofold. First, it removes `VariantArrayHandle`'s dependence on `ArrayHandleVirtual`, which gets us much closer to deprecating that class. Second, it ensures that `UnknownArrayHandle` is a reasonable replacement for `VariantArrayHandle`, so we can move forward with replacing that.
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