public void testAccessInnerVariable() throws Exception {
    ZonedDateTime firstTick = clock.time();
    ZonedDateTime verifyFirstTick = clock.lastTick();
    assertEquals(verifyFirstTick, firstTick);

    ZonedDateTime secondTick = clock.time();
    ZonedDateTime verifySecondTick = clock.lastTick();
    assertEquals(verifySecondTick, secondTick);
  }