code: def to_api_repr(self):
          
  
          source_ref = {
              "projectId": self.source.project,
              "datasetId": self.source.dataset_id,
              "tableId": self.source.table_id,
          }
  
          configuration = self._configuration.to_api_repr()
          _helpers._set_sub_prop(configuration, ["extract", "sourceTable"], source_ref)
          _helpers._set_sub_prop(
              configuration, ["extract", "destinationUris"], self.destination_uris
          )
  
          return {
              "jobReference": self._properties["jobReference"],
              "configuration": configuration,
          }
docs: Generate a resource for :meth:`_begin`.