def addListener(self, listener, iface=None):
        raise NotImplementedError
Deletes a ticket from the database.
dataset/ETHPy150Open rwl/muntjac/muntjac/data/property.py/IReadOnlyStatusChangeNotifier.addListener--crossover with--dataset/ETHPy150Open getlogbook/logbook/logbook/ticketing.py/MongoDBBackend.delete_ticket