How to use the bleak.backends.bluezdbus.defs.DEVICE_INTERFACE function in bleak

def parse_msg(message):
        if message.member == "InterfacesAdded":
            msg_path = message.body[0]
            try:
                device_interface = message.body[1].get("org.bluez.Device1", {})
            except Exception as e:
                raise e
            devices[msg_path] = (
                {**devices[msg_path], **device_interface}
                if msg_path in devices
                else device_interface
            )
        elif message.member == "PropertiesChanged":
            iface, changed, invalidated = message.body
            if iface != defs.DEVICE_INTERFACE:
                return

            msg_path = message.path
            # the PropertiesChanged signal only sends changed properties, so we
            # need to get remaining properties from cached_devices. However, we
            # don't want to add all cached_devices to the devices dict since
            # they may not actually be nearby or powered on.
            if msg_path not in devices and msg_path in cached_devices:
                devices[msg_path] = cached_devices[msg_path]
            devices[msg_path] = (
                {**devices[msg_path], **changed} if msg_path in devices else changed
            )
        elif (
            message.member == "InterfacesRemoved"
            and message.body[1][0] == defs.BATTERY_INTERFACE
        ):

def _services_resolved_callback(message):
            iface, changed, invalidated = message.body
            is_resolved = defs.DEVICE_INTERFACE and changed.get(
                "ServicesResolved", False
            )
            if iface == is_resolved:
                logger.info("Services resolved.")
                self.services_resolved = True

    async def _get_device_properties(self, interface=defs.DEVICE_INTERFACE) -> dict:
        """Get properties of the connected device.

        Args:
            interface: Which DBus interface to get properties on. Defaults to `org.bluez.Device1`.

        Returns:
            (dict) The properties.

        """
        return await self._bus.callRemote(
            self._device_path,
            "GetAll",
            interface=defs.PROPERTIES_INTERFACE,
            destination=defs.BLUEZ_SERVICE,
            signature="s",
            body=[interface],