until -package:numeric-prelude -package:streaming -package:yesod-paginator -package:mixed-types-num -package:base-prelude -package:foundation -package:snap-core -package:singletons-base is:exact package:utility-ht

until :: Monad m => (a -> Bool) -> m a -> m a
utility-ht Control.Monad.HT
repeat action until result fulfills condition