Control.Monad.Plus
msum
msum'
mfold
mfromList
mfromMaybe
mreturn
mpartition
mscatter
mscatter'
mcatMaybes
mlefts
mrights
mpartitionEithers
mmapMaybe
mconcatMap
mconcatMap'
data Partial a b
partial
predicate
always
never