private static Entry<String, List<ConfigSynonym>> single(String topicConfigName, String brokerConfigName) {
        return Utils.mkEntry(topicConfigName, asList(new ConfigSynonym(brokerConfigName)));
    }
Return the server config with the highest priority for `topicConfigName` if it exists. Otherwise,
throw NoSuchElementException.
server-common/src/main/java/org/apache/kafka/server/config/ServerTopicConfigSynonyms.java