code: func (c *MTurk) UpdateNotificationSettings(input *UpdateNotificationSettingsInput) (*UpdateNotificationSettingsOutput, error) {
  	req, out := c.UpdateNotificationSettingsRequest(input)
  	return out, req.Send()
  }
docs: // UpdateNotificationSettings API operation for Amazon Mechanical Turk.
  //
  // The UpdateNotificationSettings operation creates, updates, disables or re-enables
  // notifications for a HIT type. If you call the UpdateNotificationSettings
  // operation for a HIT type that already has a notification specification, the
  // operation replaces the old specification with a new one. You can call the
  // UpdateNotificationSettings operation to enable or disable notifications for
  // the HIT type, without having to modify the notification specification itself
  // by providing updates to the Active status without specifying a new notification
  // specification. To change the Active status of a HIT type's notifications,
  // the HIT type must already have a notification specification, or one must
  // be provided in the same call to UpdateNotificationSettings.
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for Amazon Mechanical Turk's
  // API operation UpdateNotificationSettings for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeServiceFault "ServiceFault"
  //   Amazon Mechanical Turk is temporarily unable to process your request. Try
  //   your call again.
  //
  //   * ErrCodeRequestError "RequestError"
  //   Your request is invalid.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/mturk-requester-2017-01-17/UpdateNotificationSettings