code: def validate_service_request(version, service)
        # Check if the current config supports the requested version.
        unless api_config.has_version(version)
          raise AdsCommon::Errors::Error,
              "Version '%s' not recognized" % version.to_s
        end
  
        # Check if the specified version has the requested service.
        unless api_config.version_has_service(version, service)
          raise AdsCommon::Errors::Error,
              "Version '%s' does not contain service '%s'" %
              [version.to_s, service.to_s]
        end
      end
docs: Auxiliary method to test parameters correctness for the service request.