@JsonProperty
    public Map<String, ?> offset() {
        return offset;
    }
Represents a single {partition, offset} pair for either a sink connector or a source connector. For source connectors,
the partition and offset structures are defined by the connector implementations themselves. For a sink connector,
where offsets represent the underlying Kafka consumer group offsets, this would look something like:
<pre>
    {
      "partition": {
        "kafka_topic": "topic"
        "kafka_partition": 3
      },
      "offset": {
        "kafka_offset": 1000
      }
    }
</pre>
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/rest/entities/ConnectorOffset.java