private void waitForClockToChange(Region region) {
    waitForClockToChange(region, 0);
  }
Tests that the {@linkplain CacheStatistics#getLastAccessedTime last access time} and
{@link CacheStatistics#getLastModifiedTime last modified time} are updated appropriately for a
partitioned region with only one server.
geode-core/src/distributedTest/java/org/apache/geode/cache30/CacheStatisticsPartitionedRegionDUnitTest.java