docs: public SimpleConfiguration getClientConfiguration() {
      SimpleConfiguration clientConfig = new SimpleConfiguration();
      Iterator<String> iter = getKeys();
      while (iter.hasNext()) {
        String key = iter.next();
        if (key.startsWith(CONNECTION_PREFIX) || key.startsWith(ACCUMULO_PREFIX)
            || key.startsWith(CLIENT_PREFIX)) {
          clientConfig.setProperty(key, getRawString(key));
        }
      }
      return clientConfig;
    }