How to use the s3transfer.futures.TransferMeta function in s3transfer

def setUp(self):
        self.subscriber = RecordingSubscriber()
        self.second_subscriber = RecordingSubscriber()
        self.call_args = CallArgs(subscribers=[
            self.subscriber, self.second_subscriber]
        )
        self.transfer_meta = TransferMeta(self.call_args)
        self.transfer_future = TransferFuture(self.transfer_meta)

def setUp(self):
        self.transfer_future = mock.Mock(spec=TransferFuture)
        self.transfer_meta = TransferMeta()
        self.transfer_future.meta = self.transfer_meta

def test_returns_future_with_meta(self):
        self._setup_default_stubbed_responses()
        future = self.method(**self.create_call_kwargs())
        # The result is called so we ensure that the entire process executes
        # before we try to clean up resources in the tearDown.
        future.result()

        # Assert the return value is a future with metadata associated to it.
        self.assertIsInstance(future, TransferFuture)
        self.assertIsInstance(future.meta, TransferMeta)

def _get_future_with_components(self, call_args):
        transfer_id = self._id_counter
        # Creates a new transfer future along with its components
        transfer_coordinator = TransferCoordinator(transfer_id=transfer_id)
        # Track the transfer coordinator for transfers to manage.
        self._coordinator_controller.add_transfer_coordinator(
            transfer_coordinator)
        # Also make sure that the transfer coordinator is removed once
        # the transfer completes so it does not stick around in memory.
        transfer_coordinator.add_done_callback(
            self._coordinator_controller.remove_transfer_coordinator,
            transfer_coordinator)
        components = {
            'meta': TransferMeta(call_args, transfer_id=transfer_id),
            'coordinator': transfer_coordinator
        }
        transfer_future = TransferFuture(**components)
        return transfer_future, components

def _get_future_with_components(self, call_args):
        transfer_id = self._id_counter
        # Creates a new transfer future along with its components
        transfer_coordinator = TransferCoordinator(transfer_id=transfer_id)
        # Track the transfer coordinator for transfers to manage.
        self._coordinator_controller.add_transfer_coordinator(
            transfer_coordinator)
        # Also make sure that the transfer coordinator is removed once
        # the transfer completes so it does not stick around in memory.
        transfer_coordinator.add_done_callback(
            self._coordinator_controller.remove_transfer_coordinator,
            transfer_coordinator)
        components = {
            'meta': TransferMeta(call_args, transfer_id=transfer_id),
            'coordinator': transfer_coordinator
        }
        transfer_future = TransferFuture(**components)
        return transfer_future, components

def _get_future_with_components(self, call_args):
        transfer_id = self._id_counter
        # Creates a new transfer future along with its components
        transfer_coordinator = TransferCoordinator(transfer_id=transfer_id)
        # Track the transfer coordinator for transfers to manage.
        self._coordinator_controller.add_transfer_coordinator(
            transfer_coordinator)
        # Also make sure that the transfer coordinator is removed once
        # the transfer completes so it does not stick around in memory.
        transfer_coordinator.add_done_callback(
            self._coordinator_controller.remove_transfer_coordinator,
            transfer_coordinator)
        components = {
            'meta': TransferMeta(call_args, transfer_id=transfer_id),
            'coordinator': transfer_coordinator
        }
        transfer_future = TransferFuture(**components)
        return transfer_future, components

def __init__(self, meta=None, coordinator=None):
        """The future associated to a submitted transfer request

        :type meta: TransferMeta
        :param meta: The metadata associated to the request. This object
            is visible to the requester.

        :type coordinator: TransferCoordinator
        :param coordinator: The coordinator associated to the request. This
            object is not visible to the requester.
        """
        self._meta = meta
        if meta is None:
            self._meta = TransferMeta()

        self._coordinator = coordinator
        if coordinator is None:
            self._coordinator = TransferCoordinator()