public function update($id, array $lossReason, array $options = array())
  {
    $attributes = array_intersect_key($lossReason, array_flip(self::$keysToPersist));

    list($code, $updatedLossReason) = $this->httpClient->put("/loss_reasons/{$id}", $attributes, $options);
    return $updatedLossReason;
  }