- lefts :: [Either a b] -> [a]
- rights :: [Either a b] -> [b]
- concatEithers :: [Either a b] -> Either [a] [b]
- partitionEithers :: [Either a b] -> ([a], [b])

- lefts :: [Either a b] -> [a]
- rights :: [Either a b] -> [b]
- concatEithers :: [Either a b] -> Either [a] [b]
- partitionEithers :: [Either a b] -> ([a], [b])