h a ByteString for convenience when using OverloadedStrings
notFound' ∷ B.ByteString -- ^ Response body
          → Route Response
notFound' = return ∘ Response 404
{-# INLINE notFound' #-}

-- | Returns 
notFound' ∷ B.ByteString -- ^ Response body
          → Route Response
notFound' = return ∘ Response 404
notFound' = return ∘ Response 404