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