foldMapWithKey :: Monoid m => (k -> Set a -> m) -> Multimap k a -> m
foldMapWithKey f (Multimap m) = Map.foldMapWithKey f m
foldMapWithKey :: Monoid m => (k -> Set a -> m) -> Multimap k a -> m
foldMapWithKey f (Multimap m) = Map.foldMapWithKey f m
foldMapWithKey f (Multimap m) = Map.foldMapWithKey f m