code: func (api *API) UpdateCustomHostnameSSL(zoneID string, customHostnameID string, ssl CustomHostnameSSL) (CustomHostname, error) {
  	return CustomHostname{}, errors.New("Not implemented")
  }
docs: // UpdateCustomHostnameSSL modifies SSL configuration for the given custom
  // hostname in the given zone.
  //
  // API reference: https://api.cloudflare.com/#custom-hostname-for-a-zone-update-custom-hostname-configuration