public static long elapsed(long started, long finished) {
    return Times.elapsed(started, finished, true);
  }
@Test
  void testPositiveStartandFinishTimes() {
    long elapsed = Times.elapsed(5, 10, true);
    assertEquals(5, elapsed, "Elapsed time is not 5");
    elapsed = Times.elapsed(5, 10, false);
    assertEquals(5, elapsed, "Elapsed time is not 5");
  }