ormolu/data/examples/declaration/class/default-implementations-comments.hs

-- | Baz
class Baz a where
    foobar :: a -> a
    foobar a =
        barbaz (bazbar a)
    -- | Bar baz
    barbaz ::
        a -> a
    -- | Baz bar
    bazbar ::
        a ->
        a
    -- First comment
    barbaz a
        = bazbar -- Middle comment
            a
    -- Last comment
    bazbar a
        = barbaz
            a