def get_diagnostics(self, context, instance):
        # FIXME(comstud): Cache this?
        # Also: only calling super() to get state/policy checking
        super(ComputeCellsAPI, self).get_diagnostics(context, instance)
        return self._call_to_cells(context, instance, 'get_diagnostics')
Changing a NULL field to NOT NULL
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/compute/cells_api.py/ComputeCellsAPI.get_diagnostics--crossover with--dataset/ETHPy150Open django/django/django/db/migrations/questioner.py/MigrationQuestioner.ask_not_null_alteration