anchor.diff:  * Names of the collection and database that contain the updated document.
   * If the event was part of a snapshot.
   * Timestamp for when the change was made in the database and ordinal of the event within the timestamp.
  -* Unique identifier of the MongoDB operation, which depends on the version of MongoDB. It is either the `h` field in the oplog event, or a field named `stxnid`, which represents the `lsid` and `txnNumber` fields from the oplog event.
  +* Unique identifiers of the MongoDB session `lsid` and transaction number `txnNumber` in case the change was executed inside a transaction.
   
   |===
   
  
positive.code: * Names of the collection and database that contain the new document.
  * If the event was part of a snapshot.
  * Timestamp for when the change was made in the database and ordinal of the event within the timestamp.
  * Unique identifier of the MongoDB operation, which depends on the version of MongoDB. It is either the `h` field in the oplog event, or a field named `stxnid`, which represents the `lsid` and `txnNumber` fields from the oplog event.
  
  |8
  |`op`
  
negative.code: * Names of the collection and database that contained the deleted document.
  * If the event was part of a snapshot.
  * Timestamp for when the change was made in the database and ordinal of the event within the timestamp.
  * Unique identifier of the MongoDB operation, which depends on the version of MongoDB. It is either the `h` field in the oplog event, or a field named `stxnid`, which represents the `lsid` and `txnNumber` fields from the oplog event (oplog capture mode only).
  * Unique identifiers of the MongoDB session `lsid` and transaction number `txnNumber` in case the change was executed inside a transaction (change streams capture mode only).
  
  |===
  
  