magicIdPrimRep HpLim = PtrRep
magicIdPrimRep CurCostCentre = CostCentreRep
magicIdPrimRep VoidReg = VoidRep
+magicIdPrimRep CurrentTSO = ThreadIdRep
+magicIdPrimRep CurrentNursery = PtrRep
\end{code}
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