public EndpointResponse get() {
    return EndpointResponse.ok(new ServerInfo(
        appVersion.get(),
        kafkaClusterId.get(),
        ksqlServiceId.get(),
        serverStatus.get().toString()));
  }
@Test
  public void shouldGetKafkaClusterIdOnce() {
    // When:
    serverInfoResource.get();
    serverInfoResource.get();

    // Then:
    verify(adminClient).describeCluster();
    verifyNoMoreInteractions(adminClient);
  }