func TestSortedCast(t *testing.T) {
	s := list.NewSorted(17, false)
	_ = types.Hashable(s)
	_ = types.OrderedList(s)
}
func TestSetCast(t *testing.T) {
	s := set.NewSortedSet(17)
	_ = types.Set(s)
	_ = types.Hashable(s)
}
func TestListCast(t *testing.T) {
	s := list.New(17)
	_ = types.Hashable(s)
	_ = types.List(s)
}