def SetStartDate(self, start_date):
    self.start_date = start_date
Returns the parent for portlets.
dataset/ETHPy150Open google/transitfeed/transitfeed/serviceperiod.py/ServicePeriod.SetStartDate--crossover with--dataset/ETHPy150Open diefenbach/django-lfs/lfs/catalog/models.py/Category.get_parent_for_portlets