def migrate_instance_start(self, context, instance, migration):
        raise NotImplementedError()
alternate: manage.py builtin commands fail if settings are provided as argument but no defaults
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/network/base_api.py/NetworkAPI.migrate_instance_start--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/tests/regressiontests/admin_scripts/tests.py/ManageAlternateSettings.test_builtin_with_settings