@Override
    protected boolean hasExpired(long msUntilTombstoneExpires) {
      /*
       * In case the tombstone expiration time would be too far out lets cap it. This is just
       * making the system fault tolerant in the case that there are large clock jumps or
       * unrealistically large timestamps.
       */
      return msUntilTombstoneExpires <= 0 || msUntilTombstoneExpires > EXPIRY_TIME;
    }
For test purposes only, force the expiration of a number of tombstones for replicated regions.

@param count Number of tombstones to expire
@param timeout the maximum time to wait
@param unit the time unit of the {@code timeout} argument

@return true if the expiration occurred
geode-core/src/main/java/org/apache/geode/internal/cache/TombstoneService.java