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