public long maxTimestamp()
  {
    return ranges == null
            ? topLevel.markedForDeleteAt
            : Math.max(topLevel.markedForDeleteAt, ranges.maxMarkedAt());
  }
public long maxTimestamp ( ) { return ranges == null ? topLevel . markedForDeleteAt : Math . max ( topLevel . markedForDeleteAt , ranges . maxMarkedAt ( ) ) ; }
Returns the maximum timestamp in any of the range tombstones or the top-level tombstone.