traverseWithKey for Data.Map et. al.

Has there yet been a proposal for adding traverseWithKey :: Applicative f => (k -> a -> f b) -> Map k a -> f (Map k b) to Data.Map and friends yet? If not I'll draw up a proposal. -- Russell O'Connor http://r6.ca/ ``All talk about `theft,''' the general counsel of the American Graphophone Company wrote, ``is the merest claptrap, for there exists no property in ideas musical, literary or artistic, except as defined by statute.''