- , isJust -- :: Maybe a -> Bool
- , isNothing -- :: Maybe a -> Bool
- , fromJust -- :: Maybe a -> a
- , fromMaybe -- :: a -> Maybe a -> a
+ , isJust -- :: Maybe a -> Bool
+ , isNothing -- :: Maybe a -> Bool
+ , fromJust -- :: Maybe a -> a
+ , fromMaybe -- :: a -> Maybe a -> a