def get_root_tiers(self):

        return [poioapi.io.graf.Tier(self._record_tag)]
Gets the @var placeholders
dataset/ETHPy150Open cidles/poio-api/src/poioapi/io/odin.py/Parser.get_root_tiers--crossover with--dataset/ETHPy150Open project-fondue/python-yql/yql/__init__.py/YQLQuery.get_placeholder_keys