anchor.diff:  {
       "schema": {
           "type": "struct",
  -        "optional": false,
  -        "name": "PostgreSQL_server.public.customers.Envelope",
  -        "version": 1,
           "fields": [
               {
  -                "field": "op",
  -                "type": "string",
  -                "optional": false
  -            },
  -            {
  -                "field": "before",
                   "type": "struct",
  -                "optional": true,
  -                "name": "PostgreSQL_server.public.customers.Value",
  -                "fields": [
  -                    {
  -                        "type": "int32",
  -                        "optional": false,
  -                        "field": "id"
  -                    }
  -                ]
  -            },
  -            {
  -                "field": "after",
  -                "type": "struct",
  -                "name": "PostgreSQL_server.public.customers.Value",
  -                "optional": true,
                   "fields": [
                       {
                           "type": "int32",
  
positive.code:         },
          "source": {
              "version": "{debezium-version}",
              "name": "PostgreSQL_server",
              "db": "postgres",
              "ts_usec": "1482918357011699",
              "txId": "556",
              "lsn": "26523128",
              "schema": "public",
              "table": "customers",
              "snapshot": null,
              "last_snapshot_record": null
          },
          "op": "u",
          "ts_ms": 1465584025523
  
negative.code:         },
          "source": {
              "version": "{debezium-version}",
              "connector": "postgresql",
              "name": "PostgreSQL_server",
              "ts_ms": 1559033904863,
              "snapshot": true,
              "db": "postgres",
              "schema": "public",
              "table": "customers",
              "txId": 555,
              "lsn": 24023128,
              "xmin": null
          },
          "op": "c",
          "ts_ms": 1559033904863
      }
  }
  ----
  