code: func (cli *OpsGenieClient) NotificationV2() (*OpsGenieNotificationV2Client, error) {
  	cli.makeHTTPTransportSettings()
  
  	notificationClient := new(OpsGenieNotificationV2Client)
  	notificationClient.SetOpsGenieClient(*cli)
  
  	if cli.opsGenieAPIURL == "" {
  		notificationClient.SetOpsGenieAPIUrl(endpointURL)
  	}
  
  	return notificationClient, nil
  }
docs: // NotificationV2 instantiates a new OpsGenieNotificationV2Client