code: def add_firmware_manifest(self, name, datafile, key_table_file=None, **kwargs):
          
          kwargs.update({
              'name': name,
              'url': datafile,  # really it's the datafile
          })
          if key_table_file is not None:
              kwargs.update({'key_table_url': key_table_file})  # really it's the key_table
          firmware_manifest = FirmwareManifest._create_request_map(kwargs)
          api = self._get_api(update_service.DefaultApi)
          return FirmwareManifest(
              api.firmware_manifest_create(**firmware_manifest)
          )
docs: Add a new manifest reference.
  
          :param str name: Manifest file short name (Required)
          :param str datafile: The file object or path to the manifest file (Required)
          :param str key_table_file: The file object or path to the key_table file (Optional)
          :param str description: Manifest file description
          :return: the newly created manifest file object
          :rtype: FirmwareManifest