code: @Test public void should_persist_and_get_proxy() throws Exception {
    long id=RandomUtils.nextLong();
    EmbeddedKey compositeRowKey=new EmbeddedKey(id,"type");
    EntityWithCompositePartitionKey entity=new EntityWithCompositePartitionKey(id,"type","clustered_value");
    manager.persist(entity);
    EntityWithCompositePartitionKey found=manager.getProxy(EntityWithCompositePartitionKey.class,compositeRowKey);
    assertThat(found.getId()).isEqualTo(compositeRowKey);
    assertThat(found.getValue()).isEqualTo("clustered_value");
  }
  