foldMap +base

foldMap :: (Foldable t, Monoid m) => (a -> m) -> t a -> m
base Data.Foldable
foldMapDefault :: (Traversable t, Monoid m) => (a -> m) -> t a -> m
base Data.Traversable
This function may be used as a value for Data.Foldable.foldMap in a Foldable instance.