(=.<<) :: Monad m =>
          (a -> b -> m c)
       -> m b
       -> a -> m c
(=.<<) mf x a = mf a =<< x
(=.<<) :: Monad m =>
          (a -> b -> m c)
       -> m b
       -> a -> m c
(=.<<) mf x a = mf a =<< x
(=.<<) mf x a = mf a =<< x