protected function _loadFrom($uri) {
    if (empty($uri)) {
      return;
    }

    $response = $this->_client->request(Recurly_Client::GET, $uri);
    $response->assertValidResponse();

    $this->_objects = array();
    $this->__parseXmlToUpdateObject($response->body);
    $this->_afterParseResponse($response, $uri);
  }