@Override
    public String toString() {
        return "ExactlyOnceWorkerSourceTask{" +
            "id=" + id +
            '}';
    }
WorkerTask that uses a {@link SourceTask} to ingest data into Kafka, with support for exactly-once semantics.
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/ExactlyOnceWorkerSourceTask.java