def __contains__(self, key):
Returns a BaseInlineFormSet class for use in admin add/change views.
dataset/ETHPy150Open twisted/ldaptor/ldaptor/interfaces.py/ILDAPEntry.__contains__--crossover with--dataset/ETHPy150Open jschrewe/django-mongoadmin/mongoadmin/options.py/EmbeddedInlineAdmin.get_formset