code: @Test public void should_persist_and_get_proxy() throws Exception {
    long id=RandomUtils.nextLong();
    Integer index=11;
    compoundKey=new EmbeddedKey(id,"type",index);
    entity=new ClusteredEntityWithCompositePartitionKey(id,"type",index,"clustered_value");
    manager.persist(entity);
    ClusteredEntityWithCompositePartitionKey found=manager.getProxy(ClusteredEntityWithCompositePartitionKey.class,compoundKey);
    assertThat(found.getId()).isEqualTo(compoundKey);
    assertThat(found.getValue()).isEqualTo("clustered_value");
  }
  