static QueryInstancesClient of(WebClient webClient, String nacosApiVersion, String serviceName,
                                   @Nullable String namespaceId, @Nullable String groupName,
                                   @Nullable String clusterName, @Nullable Boolean healthyOnly,
                                   @Nullable String app) {
        return new QueryInstancesClient(webClient, nacosApiVersion, serviceName, namespaceId, groupName,
                                        clusterName, healthyOnly, app);
    }
A Nacos client that is responsible for
<a href="https://nacos.io/en-us/docs/v2/guide/user/open-api.html">Nacos Open-Api - Query instances</a>.
nacos/src/main/java/com/linecorp/armeria/internal/nacos/QueryInstancesClient.java