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-rw-r--r--BackendClass.hs4
1 files changed, 3 insertions, 1 deletions
diff --git a/BackendClass.hs b/BackendClass.hs
index 909ae8f96..b2d8879c2 100644
--- a/BackendClass.hs
+++ b/BackendClass.hs
@@ -29,7 +29,9 @@ data Backend a = Backend {
-- (second parameter may be the filename associated with it)
-- (third parameter may be the number of copies that there should
-- be of the key)
- fsckKey :: Key -> Maybe FilePath -> Maybe Int -> a Bool
+ fsckKey :: Key -> Maybe FilePath -> Maybe Int -> a Bool,
+ -- Is a newer repesentation possible for a key?
+ upgradableKey :: Key -> a Bool
}
instance Show (Backend a) where