- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [ ] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: xxx
* Operating System version: xxx
* Java version: xxx

### Steps to reproduce this issue

1. xxx
2. xxx
3. xxx

Pls. provide [GitHub address] to reproduce this issue.

### Expected Result

What do you expected from the above steps？

### Actual Result

What actually happens?

If there is an exception, please attach the exception trace:

```
Just put your stack trace here!
```

return instance;
    }
    private NacosServiceName createServiceName(URL url) {
        return valueOf(url);
    }
    private String getServiceName(URL url) {
        return getServiceName(url, url.getCategory(DEFAULT_CATEGORY));
    }
    private String getServiceName(URL url, String category) {
        return category + SERVICE_NAME_SEPARATOR + url.getColonSeparatedKey();
    }
    private void filterEnabledInstances(Collection<Instance> instances) {
        filterData(instances, Instance::isEnabled);
    }
    /**
     * A filter for Nacos data
     *
     * @since 2.6.5
     */
    private interface NacosDataFilter<T> {
        /**
         * Tests whether or not the specified data should be accepted.
         *
         * @param data The data to be tested
         * @return <code>true</code> if and only if <code>data</code>
         * should be accepted
         */
        boolean accept(T data);
    }
    private class RegistryChildListenerImpl implements EventListener {