public boolean created() {
            return created;
        }
Set the level for a logging namespace (i.e., a specific logger and all of its children) for all workers
in the cluster. Changes should only last over the lifetime of workers, and should be wiped if/when
workers are restarted.
@param namespace the logging namespace to alter; may not be null
@param level the new level to set for the namespace; may not be null
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/Herder.java