* the same key
* @param userConfig the user config key-value pairs to add
* @return true if the user config was updated, false otherwise
*/
public boolean updateUserConfig(UserConfig userConfig) {
ClusterConfiguration clusterConfig = new ClusterConfiguration(_clusterId);
clusterConfig.addNamespacedConfig(userConfig);
return _accessor.updateProperty(_keyBuilder.clusterConfig(), clusterConfig);
}