private void waitForClockToChange(Region region, long millisecs) {
    long time = ((InternalRegion) region).cacheTimeMillis();
    while (time >= ((InternalRegion) region).cacheTimeMillis() + millisecs) {
    }
  }
Waits for the time in the <code>region</code> to step up
beyond the current time in the region plus the number of
milliseconds passed in the <code>millisecs</code> argument.
geode-core/src/distributedTest/java/org/apache/geode/cache30/CacheStatisticsPartitionedRegionDUnitTest.java