def _get_cache_key(self, instance=None):
        if instance:
            return "ST_HANDLER.%s.%s.%s" % (self.content_type.pk, instance.pk, self.field)
        return None
dataset/ETHPy150Open callowayproject/django-supertagging/supertagging/markup.py/MarkupHandler._get_cache_key/original