anchor.diff:  [source,json,options="nowrap",indent=0,subs="+attributes"]
   ----
   {
  -    "schema": { <1>
  +    "schema": { // <1>
         "type": "struct",
         "fields": [
           {
             "type": "string",
             "optional": true,
  -          "name": "io.debezium.data.Json", <2>
  +          "name": "io.debezium.data.Json", // <2>
             "version": 1,
             "field": "after"
           },
           {
             "type": "string",
             "optional": true,
  -          "name": "io.debezium.data.Json", <2>
  +          "name": "io.debezium.data.Json", 
             "version": 1,
             "field": "patch"
           },
           {
             "type": "string",
             "optional": true,
  -          "name": "io.debezium.data.Json", <2>
  +          "name": "io.debezium.data.Json", 
             "version": 1,
             "field": "filter"
           },
  
positive.code: 
  |4
  |`source`
  a| Mandatory field that describes the source metadata for the event. This field contains the same information as a _create_ or _update_ event for the same collection, but the values are different since this event is from a different position in the oplog. The source metadata includes: 
  
  * {prodname} version.
  * Name of the connector that generated the event.
  
negative.code: {
      "schema": { ... },
      "payload": {
        "op": "u", // <1>
        "ts_ms": 1465491461815, // <2>
        "patch": "{\"$set\":{\"first_name\":\"Anne Marie\"}}", // <3>
        "filter": "{\"_id\" : {\"$numberLong\" : \"1004\"}}", // <4>
        "source": { // <5>
          "version": "{debezium-version}",
          "connector": "mongodb",
          "name": "fulfillment",
  