code: def endpoint(version, service)
        base = get_wsdl_base(version)
        if !subdir_config().nil?
          base = base.to_s + subdir_config()[[version, service]].to_s
        end
        return base.to_s + version.to_s + '/' + service.to_s
      end
docs: Get the endpoint for a service on a given API version.
  
   Args:
   - version: the API version
   - service: the name of the API service
  
   Returns:
   The endpoint URL