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