úÎ|ò Safe-Inferred Convert to a  via  before calling . 5Instance for all monad transformers, simply lift the failure into the  base monad.        failure-0.2.0.1Control.FailureFailurefailure exceptionbase GHC.Exception SomeException toException $fFailureet $fFailureeIO$fFailureeEither $fFailuree[]$fFailureeMaybe