def __init__(self, start_date: str, store_name: str, end_date: str=None, **kwargs):
    self._start_date = start_date
    self._end_date = end_date
    self.store_name = store_name
    super().__init__(**kwargs)
def __init__(self, start_date: str, store_name: str, end_date: str=None, **kwargs):
    self._start_date = start_date
    self._end_date = end_date
    self.store_name = store_name
    super().__init__(**kwargs)