def is_leaf_node(self):
        return not self.get_descendant_count()
Allow all access.
dataset/ETHPy150Open django-mptt/django-mptt/mptt/models.py/MPTTModel.is_leaf_node--crossover with--dataset/ETHPy150Open google/grr/grr/lib/aff4_objects/user_managers.py/NullAccessControlManager.CheckDataStoreAccess