include Hash_set_intf.Creators withtype 'a t := 'a tandtype 'a elt = 'a andtype ('key, 'z) create_options := ('key, 'z) Hash_set_intf.create_options_with_hashable_required
include Hash_set_intf.Accessors withtype 'a t := 'a tandtype 'a elt := 'a elt
include Hash_set_intf.Creators withtype 'a t := 'a tandtype 'a elt = 'a andtype ('key, 'z) create_options := ('key, 'z) Hash_set_intf.create_options_without_hashable
include Hash_set_intf.Accessors withtype 'a t := 'a tandtype 'a elt := 'a elt