def GetVOffsetTSlot(self, slot, d):
        """
        GetVOffsetTSlot retrieves the VOffsetT that the given vtable location
        points to. If the vtable value is zero, the default value `d`
        will be returned.
        """

        N.enforce_number(slot, N.VOffsetTFlags)
        N.enforce_number(d, N.VOffsetTFlags)

        off = self.Offset(slot)
        if off == 0:
                return d
        return off
GetVOffsetTSlot retrieves the VOffsetT that the given vtable location
        points to. If the vtable value is zero, the default value `d`
        will be returned.