class AutoSplitTracker {
public:
  bool newDoc(const BSONObj& minChunkKey, const BSONObj& maxChunkKey, const BSONObj& doc) {
    // Check inconsistency in mix/max pair with our own map and delete inconsistent entries.
    // Inconsistent entries are caused by the changes in chunk boundaries due to the chunks being merged or splitted.

    _map[minChunkKey].increment(doc.objsize());

    if (_map[minChunkKey].size() > splitThreshold) {
       // use splitVector to determine if we actually need to split
    }
  }
}