foldlWithKey :: (a -> k -> Set b -> a) -> a -> Multimap k b -> a
foldlWithKey f a (Multimap m) = Map.foldlWithKey f a m
foldlWithKey :: (a -> k -> Set b -> a) -> a -> Multimap k b -> a
foldlWithKey f a (Multimap m) = Map.foldlWithKey f a m
foldlWithKey f a (Multimap m) = Map.foldlWithKey f a m