class CloudConfigObserverEntity implements CloudConfigHandler {
    static final Logger log = LoggerFactory.getLogger(CloudConfigObserverEntity.class);

    public String group;
    public String key;
    public CloudConfigHandler handler;

    public CloudConfigObserverEntity(String group, String key, CloudConfigHandler handler) {
        this.group = group;
        this.key = key;
        this.handler = handler;
    }

    @Override
    public void handle(Config config) {<FILL_FUNCTION_BODY>}
}

        try {
            handler.handle(config);
        } catch (Throwable e) {
            log.warn(e.getMessage(), e);
        }
    
<no_super_class>