code: def from_http_json(operation, api_request, result_type, **kwargs):
      
      operation_proto = json_format.ParseDict(operation, operations_pb2.Operation())
      refresh = functools.partial(_refresh_http, api_request, operation_proto.name)
      cancel = functools.partial(_cancel_http, api_request, operation_proto.name)
      return Operation(operation_proto, refresh, cancel, result_type, **kwargs)
docs: Create an operation future using a HTTP/JSON client.
  
      This interacts with the long-running operations `service`_ (specific
      to a given API) via `HTTP/JSON`_.
  
      .. _HTTP/JSON: https://cloud.google.com/speech/reference/rest/\
              v1beta1/operations#Operation
  
      Args:
          operation (dict): Operation as a dictionary.
          api_request (Callable): A callable used to make an API request. This
              should generally be
              :meth:`google.cloud._http.Connection.api_request`.
          result_type (:func:`type`): The protobuf result type.
          kwargs: Keyword args passed into the :class:`Operation` constructor.
  
      Returns:
          ~.api_core.operation.Operation: The operation future to track the given
              operation.