def register_for_deleted_items(self):
<EOL>MONGO_LISTENER.receivers[self._ns][self._receiver]['<STR_LIT:d>'] = True<EOL>
Registers for notification of deleted assessment items.

        ``ItemReceiver.deletedItems()`` is invoked when an assessment
        item is removed from the assessment bank.

        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure occurred
        *compliance: mandatory -- This method must be implemented.*