def device_unmounted(self, device):
        """Show unmount notification for specified device object."""
        if not self._mounter.is_handleable(device):
            return
        self._show_notification(
            'device_unmounted',
            _('Device unmounted'),
            _('{0.ui_label} unmounted', device),
            device.icon_name)
Show unmount notification for specified device object.