@VisibleForTesting
  int getSleepDuration() {
    return sleepDuration;
  }
@Test
  public void testNoMetricUpdatesThenNoWaiting() {
    AbfsClientThrottlingAnalyzer analyzer = new AbfsClientThrottlingAnalyzer(
        "test", abfsConfiguration);
    validate(0, analyzer.getSleepDuration());
    sleep(ANALYSIS_PERIOD_PLUS_10_PERCENT);
    validate(0, analyzer.getSleepDuration());
  }