def get_first_child(self):
        try:
            return self.get_children()[0]
        except IndexError:
            return None
If the form and formsets are valid, save the associated models.
dataset/ETHPy150Open tabo/django-treebeard/treebeard/models.py/Node.get_first_child--crossover with--dataset/ETHPy150Open AndrewIngram/django-extra-views/extra_views/advanced.py/ModelFormWithInlinesMixin.forms_valid