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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def update_product( self, product, update_mask=None, retry=google.api_core.gapic_v1.method.DEFAULT, timeout=google.api_core.gapic_v1.method.DEFAULT, metadata=None, ):
 """ Makes changes to a Product resource. Only the ``display_name``, ``description``, and ``labels`` fields can be updated right now. If labels are updated, the change will not be reflected in queries until the next index time. Possible errors: - Returns NOT\_FOUND if the Product does not exist. - Returns INVALID\_ARGUMENT if display\_name is present in update\_mask but is missing from the request or longer than 4096 characters. - Returns INVALID\_ARGUMENT if description is present in update\_mask but is longer than 4096 characters. - Returns INVALID\_ARGUMENT if product\_category is present in update\_mask. Example: Args: product (Union[dict, ~google.cloud.vision_v1.types.Product]):
 The Product resource which replaces the one on the server. product.name is immutable. If a dict is provided, it must be of the same form as the protobuf message :class:`~google.cloud.vision_v1.types.Product` update_mask (Union[dict, ~google.cloud.vision_v1.types.FieldMask]):
 The ``FieldMask`` that specifies which fields to update. If update\_mask isn't specified, all mutable fields are to be updated. Valid mask paths include ``product_labels``, ``display_name``, and ``description``. If a dict is provided, it must be of the same form as the protobuf message :class:`~google.cloud.vision_v1.types.FieldMask` retry (Optional[google.api_core.retry.Retry]):
 A retry object used to retry requests. If ``None`` is specified, requests will not be retried. timeout (Optional[float]):
 The amount of time, in seconds, to wait for the request to complete. Note that if ``retry`` is specified, the timeout applies to each individual attempt. metadata (Optional[Sequence[Tuple[str, str]]]):
 Additional metadata that is provided to the method. Returns: A :class:`~google.cloud.vision_v1.types.Product` instance. Raises: google.api_core.exceptions.GoogleAPICallError: If the request failed for any reason. google.api_core.exceptions.RetryError: If the request failed due to a retryable error and retry attempts failed. ValueError: If the parameters are invalid. """

        # Wrap the transport method to add retry and timeout logic.
        if "update_product" not in self._inner_api_calls:
            self._inner_api_calls[
                "update_product"
            ] = google.api_core.gapic_v1.method.wrap_method(
                self.transport.update_product,
                default_retry=self._method_configs["UpdateProduct"].retry,
                default_timeout=self._method_configs["UpdateProduct"].timeout,
                client_info=self._client_info,
            )

        request = product_search_service_pb2.UpdateProductRequest(
            product=product, update_mask=update_mask
        )
        if metadata is None:
            metadata = []
        metadata = list(metadata)
        try:
            routing_header = [("product.name", product.name)]
        except AttributeError:
            pass
        else:
            routing_metadata = google.api_core.gapic_v1.routing_header.to_grpc_metadata(
                routing_header
            )
            metadata.append(routing_metadata)

        return self._inner_api_calls["update_product"](
            request, retry=retry, timeout=timeout, metadata=metadata
        )