+ * call simulateShutdown on MaintenanceFixup instance before a test ends.
+ *
+ * FIXME:
+ * It would be great if we were able to use PHPUnit's getMockForAbstractClass
+ * instead of the MaintenanceFixup hack below. However, we cannot do so
+ * without changing method visibility and without working around hacks in
+ * Maintenance.php
+ *
+ * For the same reason, we cannot just use FakeMaintenance.