Sample proxy = service.newProxy(target, Sample.class, ENOUGH_MS, MILLISECONDS);
    Stopwatch stopwatch = Stopwatch.createStarted();

    assertThrows(SampleException.class, () -> proxy.sleepThenThrowException());

    assertThat(stopwatch.elapsed(MILLISECONDS)).isIn(Range.closed(DELAY_MS, ENOUGH_MS));
  }

  public void testNewProxy_badMethodWithNotEnoughTime() throws Exception {