@Override
    public ProxyClientConfig clone() {
        try {
            return (ProxyClientConfig) super.clone();
        } catch (Throwable ex) {
            logger.warn("Failed to clone ManagerConfig", ex);
            return null;
        }
    }
Configuration settings related to Manager metadata synchronization:
1. Manager address, visit protocol, authentication info
2. requested groupId, username info
3. meta cache setting info
4. other setting info
inlong-sdk/dataproxy-sdk/src/main/java/org/apache/inlong/sdk/dataproxy/common/ProxyClientConfig.java