def is_leaf_node(self):
    return not self.get_descendant_count()
data is the request.POST QueryDict.
dataset/ETHPy150Open agiliq/django-socialnews/socialnews/mptt/models.py/is_leaf_node--crossover with--dataset/ETHPy150Open scieloorg/scielo-manager/scielomanager/scielomanager/utils/pendingform.py/PendingPostData.__init__