def choices(self, cl):
        raise NotImplementedError
Test if it list all the munin plugins
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/admin/filters.py/ListFilter.choices--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/modules/munin_test.py/MuninTestCase.test_list_plugins