void testParams() {
   StackClient<String, String> client =
       ClientBuilder.<String, String>stackClientOfCodec(null)
           .configured(new FailureDetector.Param(FailureDetectors.GLOBAL_FLAG_CONFIG).mk())
           .configured(new FailureDetector.Param(FailureDetectors.NULL_CONFIG).mk())
           .configured(
               new FailureDetector.Param(
                       new FailureDetector.ThresholdConfig(Duration.Top(), 2, 5, Duration.Top()))
                   .mk());
 }