def _get_unchanged_object(self, instance):
        if instance.pk is None:
            return None
        pk = instance.pk
        try:
            unchanged_obj = instance.__class__._default_manager.get(pk=pk)
            return unchanged_obj
        except __HOLE__:
            return None
dataset/ETHPy150Open dominno/django-moderation/moderation/register.py/ModerationManager._get_unchanged_object