@Override
        public ConfigDef config() {
            return new ConfigDef();
        }
If a connector has existing tasks, and then generates new task configs, workers compare the
new and existing configs before publishing them to the config topic. If there is no difference,
workers do not publish task configs (this is a workaround to prevent infinite loops with eager
rebalancing).
<p>
This test tries to guarantee that, if the old task configs become invalid because of
an invalid config provider reference, it will still be possible to reconfigure the connector.
connect/runtime/src/test/java/org/apache/kafka/connect/integration/ConnectWorkerIntegrationTest.java