ListSetOps
unionLists
minusList
insertList
type
Assoc
a b
assoc
assocMaybe
assocUsing
assocDefault
assocDefaultUsing
emptyAssoc
unitAssoc
mapAssoc
plusAssoc_C
extendAssoc_C
mkLookupFun
findInList
assocElts
hasNoDups
runs
removeDups
findDupsEq
equivClasses
equivClassesByUniq