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

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