@VisibleForTesting
    static void resetRegistry() throws Exception {
        registry.close();
        registry = new FileWatcherRegistry();
    }
Resets the registry for {@link PropertiesEndpointGroup}.
@throws Exception when an exception occurs while closing the {@link FileWatcherRegistry}.
core/src/main/java/com/linecorp/armeria/client/endpoint/PropertiesEndpointGroup.java