(Nothing, NoDefMeth) -> do -- No default method in the class
{ warn <- doptM Opt_WarnMissingMethods
; warnTc (warn -- Warn only if -fwarn-missing-methods
(Nothing, NoDefMeth) -> do -- No default method in the class
{ warn <- doptM Opt_WarnMissingMethods
; warnTc (warn -- Warn only if -fwarn-missing-methods