def empty(self, value):
    return value is None
Test that plugin position is saved after creation
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/db/__init__.py/BooleanProperty.empty--crossover with--dataset/ETHPy150Open divio/django-cms/cms/tests/test_plugins.py/PluginsTestCase.test_plugin_order_alt