@Override
    protected String getPlainTopic() {
        return config.getTopicNameOfManagements();
    }
A handler deserializes the message of Service Management and pushes it to downstream.
oap-server/server-fetcher-plugin/kafka-fetcher-plugin/src/main/java/org/apache/skywalking/oap/server/analyzer/agent/kafka/provider/handler/ServiceManagementHandler.java