@Override
  public long sizeOf(T element) {
    LOG.warn(
        "Trying to estimate size using {}, this operation will always return 0",
        this.getClass().getSimpleName());
    return 0;
  }
@Test
  public void alwaysReturns0AsEstimatedThroughput() {
    final NullSizeEstimator<byte[]> estimator = new NullSizeEstimator<>();
    assertEquals(estimator.sizeOf(new byte[40]), 0D, DELTA);
    assertEquals(estimator.sizeOf(new byte[20]), 0D, DELTA);
    assertEquals(estimator.sizeOf(new byte[10]), 0D, DELTA);
  }