code: @Test public void should_update_set_with_cas_condition() throws Exception {
    CompleteBean entity=builder().randomId().name("John").addFollowers("Paul","Andrew").buid();
    final CompleteBean managed=manager.persist(entity);
    managed.getFollowers().add("Helen");
    managed.getFollowers().remove("Paul");
    manager.update(managed,ifConditions(new CASCondition("name","John")).withTtl(100));
    final CompleteBean actual=manager.find(CompleteBean.class,entity.getId());
    assertThat(actual.getFollowers()).containsOnly("Helen","Andrew");
  }
  