anchor.diff:  {
       "schema": { ... },
       "payload": {
  -        "before": { <1>
  +        "before": { // <1>
               "id": 1
           },
  -        "after": null, <2>
  -        "source": { <3>
  +        "after": null, // <2>
  +        "source": { // <3>
               "version": "{debezium-version}",
               "connector": "postgresql",
               "name": "PostgreSQL_server",
  
positive.code:             }
          ],
          "optional": false,
          "name": "PostgreSQL_server.inventory.customers.Envelope" <2>
      },
      "payload": { <3>
          "before": null, <4>
          "after": { <5>
              "id": 1,
              "first_name": "Anne",
              "last_name": "Kretchmar",
              "email": "annek@noanswer.org"
          },
          "source": { <6>
              "version": "{debezium-version}",
              "connector": "postgresql",
              "name": "PostgreSQL_server",
  
negative.code: {
      "schema": { ... },
      "payload": {
          "before": { // <1>
              "id": 1
          },
          "after": { // <2>
              "id": 1,
              "first_name": "Anne Marie",
              "last_name": "Kretchmar",
              "email": "annek@noanswer.org"
          },
          "source": { // <3>
              "version": "{debezium-version}",
              "connector": "postgresql",
              "name": "PostgreSQL_server",
  