public function create($name, array $options = array()) {
    $params = array_merge(array('name' => $name), $options);

    // Validate the request before sending it.
    $required = array('name', 'subject', 'folderId', 'emailGroupId');

    foreach ($required as $key) {
      $this->validateExists($params, $key);
    }

    return $this->post('assets/email', $params);
  }