public WorkerConfigTransformer configTransformer() {
        return workerConfigTransformer;
    }
<p>
Worker runs a (dynamic) set of tasks in a set of threads, doing the work of actually moving
data to/from Kafka.
</p>
<p>
Since each task has a dedicated thread, this is mainly just a container for them.
</p>
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/Worker.java