def schedule_transfer_runs(
        self,
        parent,
        start_time,
        end_time,
        retry=google.api_core.gapic_v1.method.DEFAULT,
        timeout=google.api_core.gapic_v1.method.DEFAULT,
        metadata=None,
    ):
        """
        Creates transfer runs for a time range [start\_time, end\_time]. For
        each date - or whatever granularity the data source supports - in the
        range, one transfer run is created. Note that runs are created per UTC
        time in the time range.

        Example:
            >>> from google.cloud import bigquery_datatransfer_v1
            >>>
            >>> client = bigquery_datatransfer_v1.DataTransferServiceClient()
            >>>
            >>> parent = client.project_transfer_config_path('[PROJECT]', '[TRANSFER_CONFIG]')
            >>>
            >>> # TODO: Initialize `start_time`:
            >>> start_time = {}
            >>>
            >>> # TODO: Initialize `end_time`:
            >>> end_time = {}
            >>>
            >>> response = client.schedule_transfer_runs(parent, start_time, end_time)

        Args:
            parent (str): Transfer configuration name in the form:
                ``projects/{project_id}/transferConfigs/{config_id}``.
            start_time (Union[dict, ~google.cloud.bigquery_datatransfer_v1.types.Timestamp]): Start time of the range of transfer runs. For example,
                ``"2017-05-25T00:00:00+00:00"``.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.bigquery_datatransfer_v1.types.Timestamp`
            end_time (Union[dict, ~google.cloud.bigquery_datatransfer_v1.types.Timestamp]): End time of the range of transfer runs. For example,
                ``"2017-05-30T00:00:00+00:00"``.

                If a dict is provided, it must be of the same form as the protobuf
                message :class:`~google.cloud.bigquery_datatransfer_v1.types.Timestamp`
            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.bigquery_datatransfer_v1.types.ScheduleTransferRunsResponse` 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 "schedule_transfer_runs" not in self._inner_api_calls:
            self._inner_api_calls[
                "schedule_transfer_runs"
            ] = google.api_core.gapic_v1.method.wrap_method(
                self.transport.schedule_transfer_runs,
                default_retry=self._method_configs["ScheduleTransferRuns"].retry,
                default_timeout=self._method_configs["ScheduleTransferRuns"].timeout,
                client_info=self._client_info,
            )

        request = datatransfer_pb2.ScheduleTransferRunsRequest(
            parent=parent, start_time=start_time, end_time=end_time
        )
        if metadata is None:
            metadata = []
        metadata = list(metadata)
        try:
            routing_header = [("parent", parent)]
        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["schedule_transfer_runs"](
            request, retry=retry, timeout=timeout, metadata=metadata
        )