@Override
  public void purgeCCPTimer() {
    synchronized (ccpTimerMutex) {
      if (ccpTimer != null) {
        cancelCount++;
        if (cancelCount == PURGE_INTERVAL) {
          cancelCount = 0;
          ccpTimer.timerPurge();
        }
      }
    }
  }
For use by unit tests to inject a mocked ccpTimer
geode-core/src/main/java/org/apache/geode/internal/cache/GemFireCacheImpl.java