Data.Set.Class
class HasUnion s
data Union a
class HasIntersection s
data Intersection a
class HasDifference s
class HasXUnion s
data XUnion a
class HasComplement s
class HasSingleton a s
class HasSingletonWith k a s
class HasDelete a s
class HasInsert a s
class HasInsertWith k a s
class HasEmpty s
class HasEmptyWith k s
class HasTotal s
class HasTotalWith k s
class HasSize s
class CanBeSubset s
class CanBeProperSubset s