 :: Outputable body => Maybe body -> body -> TransForm -> SDoc
pprTransStmt by using ThenForm
  = sep [ text "then", nest 2 (ppr using), nest 2 (pprBy by)]
pprTransStm
pprTransStmt :: Outputable body => Maybe body -> body -> TransForm -> SDoc
pprTransStmt by using ThenForm
  = sep [ text "then", nest 2 (ppr using), nest 2 (pprBy by)]
pprTransStmt by using ThenForm
  = sep [ text "then", nest 2 (ppr using), nest 2 (pprBy by)]