/**
  * Setter for the authorization_token field on this SystemEventSubscription.
  * 
  * @param string $authorization_token
  * @return SystemEventSubscription
  */
 public function setAuthorizationToken($authorization_token)
 {
     return parent::setAuthorizationToken(\Altumo\Validation\Strings::assertStringAndLength($authorization_token, 10, 255));
 }