public WorkerHandle addWorker() {
        WorkerHandle worker = WorkerHandle.start(workerNamePrefix + nextWorkerId.getAndIncrement(), workerProps);
        connectCluster.add(worker);
        log.info("Started worker {}", worker);
        return worker;
    }
Provision and start an additional worker to the Connect cluster.

@return the worker handle of the worker that was provisioned
connect/runtime/src/test/java/org/apache/kafka/connect/util/clusters/EmbeddedConnectCluster.java