@Override
    protected Map<String, Object> postProcessParsedConfig(final Map<String, Object> parsedValues) {
        return CommonClientConfigs.postProcessReconnectBackoffConfigs(this, parsedValues);
    }
Get the {@link CommonClientConfigs#GROUP_ID_CONFIG group ID} used by this worker to form a cluster.
The default implementation returns {@code null} and should be overridden by subclasses
if the worker mode for the subclass is capable of forming a cluster using Kafka's group coordination API.
@return the group ID for the worker's cluster, or {@code null} if the worker is not capable of forming a cluster.
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/WorkerConfig.java