code: def register_for_deleted_item(self, item_id):
          
          # Implemented from template for
          # osid.resource.ResourceNotificationSession.register_for_deleted_resource
          if not MONGO_LISTENER.receivers[self._ns][self._receiver]['d']:
              MONGO_LISTENER.receivers[self._ns][self._receiver]['d'] = []
          if isinstance(MONGO_LISTENER.receivers[self._ns][self._receiver]['d'], list):
              MONGO_LISTENER.receivers[self._ns][self._receiver]['d'].append(item_id.get_identifier())
docs: Registers for notification of a deleted assessment item.
  
          ``ItemReceiver.deletedItems()`` is invoked when the specified
          assessment item is removed from the assessment bank.
  
          arg:    item_id (osid.id.Id): the ``Id`` of the ``Item`` to
                  monitor
          raise:  NotFound - an ``Item`` was not found identified by the
                  given ``Id``
          raise:  NullArgument - ``item_id is null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure occurred
          *compliance: mandatory -- This method must be implemented.*