public WorkerLoad.Builder with(Collection<String> connectors,
                                           Collection<ConnectorTaskId> tasks) {
                withConnectors = Objects.requireNonNull(connectors,
                        "connectors may be empty but not null");
                withTasks = Objects.requireNonNull(tasks, "tasks may be empty but not null");
                return this;
            }
Get the version of the connect protocol that is currently active in the group of workers.

@return the current connect protocol version
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/distributed/WorkerCoordinator.java