Debug

undefined :: a

notImplemented :: a

trace :: Print b => b -> a -> a

traceM :: (Monad m) => Text -> m ()

traceId :: Text -> Text

traceShowM :: (P.Show a, Monad m) => a -> m ()

traceShowId :: P.Show a => a -> a

traceShow :: P.Show a => a -> b -> b

traceIO :: Print b => b -> a -> IO a