private List<String> getConfigListOnWatch(final String key, final Consumer<String> updateHandler) {
        final String serviceConfig = getServiceConfig(key, updateHandler, null);
        return GsonUtils.getInstance().fromList(serviceConfig, String.class);
    }
AbstractNodeDataSyncService.
Abstract method to monitor child node changes.
shenyu-sync-data-center/shenyu-sync-data-api/src/main/java/org/apache/shenyu/sync/data/core/AbstractNodeDataSyncService.java