closureLFInfo, isLFThunk,closureSMRep, closureUpdReqd,
closureNeedsUpdSpace, closureIsThunk,
closureSingleEntry, closureReEntrant, isConstrClosure_maybe,
closureLFInfo, isLFThunk,closureSMRep, closureUpdReqd,
closureNeedsUpdSpace, closureIsThunk,
closureSingleEntry, closureReEntrant, isConstrClosure_maybe,