def save_form(self, commit=True):
return super(SuperModelFormMixin, self).save(commit=commit)<EOL>
This calls Django's ``ModelForm.save()``. It only takes care of
saving this actual form, and leaves the nested forms and formsets
alone.

We separate this out of the
:meth:`~django_superform.forms.SuperModelForm.save` method to make
extensibility easier.