toICUMode :: NormalizationMode -> ICU.NormalizationMode
toICUMode mode =
    case mode of
       T.NFD  -> ICU.NFD
       T.NFKD -> ICU.NFKD
       T.NFC  -> ICU.NFC
       T.NFKC -> ICU.NFKC
toICUMode :: NormalizationMode -> ICU.NormalizationMode
toICUMode mode =
    case mode of
       T.NFD  -> ICU.NFD
       T.NFKD -> ICU.NFKD
       T.NFC  -> ICU.NFC
       T.NFKC -> ICU.NFKC
toICUMode mode =
    case mode of
       T.NFD  -> ICU.NFD
       T.NFKD -> ICU.NFKD
       T.NFC  -> ICU.NFC
       T.NFKC -> ICU.NFKC