How to use the secretstorage.util.bus_get_object function in SecretStorage

def create_collection(bus, label, alias='', session=None):
    """Creates a new :class:`Collection` with the given `label` and `alias`
    and returns it. This action requires prompting. If prompt is dismissed,
    raises :exc:`~secretstorage.exceptions.ItemNotFoundException`. This is
    synchronous function, uses loop from GLib API."""
    if not session:
        session = open_session(bus)
    properties = {SS_PREFIX+'Collection.Label': label}
    service_obj = bus_get_object(bus, SS_PATH)
    service_iface = dbus.Interface(service_obj, SERVICE_IFACE)
    collection_path, prompt = service_iface.CreateCollection(properties,
        alias, signature='a{sv}s')
    if len(collection_path) > 1:
        return Collection(bus, collection_path, session=session)
    dismissed, unlocked = exec_prompt_glib(bus, prompt)
    if dismissed:
        raise ItemNotFoundException('Prompt dismissed.')
    return Collection(bus, unlocked, session=session)

def search_items(bus, attributes):
    """Returns a generator of items in all collections with the given
    attributes. `attributes` should be a dictionary."""
    service_obj = bus_get_object(bus, SS_PATH)
    service_iface = dbus.Interface(service_obj, SERVICE_IFACE)
    locked, unlocked = service_iface.SearchItems(attributes,
        signature='a{ss}')
    for item_path in locked + unlocked:
        yield Item(bus, item_path)

def get_collection_by_alias(bus, alias):
    """Returns the collection with the given `alias`. If there is no
    such collection, raises
    :exc:`~secretstorage.exceptions.ItemNotFoundException`."""
    service_obj = bus_get_object(bus, SS_PATH)
    service_iface = dbus.Interface(service_obj, SERVICE_IFACE)
    collection_path = service_iface.ReadAlias(alias, signature='s')
    if len(collection_path) <= 1:
        raise ItemNotFoundException('No collection with such alias.')
    return Collection(bus, collection_path)

def __init__(self, bus, collection_path=DEFAULT_COLLECTION, session=None):
        collection_obj = bus_get_object(bus, collection_path)
        self.bus = bus
        self.session = session
        self.collection_path = collection_path
        self.collection_iface = InterfaceWrapper(collection_obj,
            COLLECTION_IFACE)
        self.collection_props_iface = InterfaceWrapper(collection_obj,
            dbus.PROPERTIES_IFACE)
        self.collection_props_iface.Get(COLLECTION_IFACE, 'Label',
            signature='ss')

def __init__(self, bus, item_path, session=None):
        self.item_path = item_path
        item_obj = bus_get_object(bus, item_path)
        self.session = session
        self.bus = bus
        self.item_iface = InterfaceWrapper(item_obj, ITEM_IFACE)
        self.item_props_iface = InterfaceWrapper(item_obj,
            dbus.PROPERTIES_IFACE)
        self.item_props_iface.Get(ITEM_IFACE, 'Label', signature='ss')