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whenIJust :: Monad m => Invisible Maybe a -> (a -> m ()) -> m ()xmonad-contrib XMonad.Util.Invisible No documentation available.
whenJust' :: (Monad m, Monoid b) => Maybe a -> (a -> m b) -> m bxmonad-contrib XMonad.Util.PureX A whenJust that accepts a monoidal return value.