code: def _refresh_http(api_request, operation_name):
      
      path = "operations/{}".format(operation_name)
      api_response = api_request(method="GET", path=path)
      return json_format.ParseDict(api_response, operations_pb2.Operation())
docs: Refresh an operation using a JSON/HTTP client.
  
      Args:
          api_request (Callable): A callable used to make an API request. This
              should generally be
              :meth:`google.cloud._http.Connection.api_request`.
          operation_name (str): The name of the operation.
  
      Returns:
          google.longrunning.operations_pb2.Operation: The operation.